Aprendemos el método de reducción doble

Matemáticas

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    <title>Ejercicio en Liveworksheets: Método de Reducción Doble</title>
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<h2>Método de Reducción Doble - Resolución de un Sistema de Ecuaciones</h2>
<p>Vamos a resolver el siguiente sistema de ecuaciones paso a paso utilizando el método de reducción doble. Responde las preguntas después de cada paso.</p>

<div class="equation">
    <div>1) Sistema de ecuaciones:</div>
    <div><strong>2x + 3y = 8</strong></div>
    <div><strong>4x - 5y = -2</strong></div>
</div>

<div class="question">
    <p><strong>Paso 1:</strong> ¿Qué debemos hacer para igualar los coeficientes de \(x\)?</p>
    <div class="answers">
        <input type="radio" name="step1" id="step1a"><label for="step1a">a) Multiplicar la primera ecuación por 2.</label><br>
        <input type="radio" name="step1" id="step1b"><label for="step1b">b) Multiplicar la segunda ecuación por 2.</label><br>
        <input type="radio" name="step1" id="step1c"><label for="step1c">c) Sumar las ecuaciones.</label><br>
        <input type="radio" name="step1" id="step1d"><label for="step1d">d) Restar las ecuaciones.</label><br>
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<div class="equation">
    <div>2) Sistema de ecuaciones después de multiplicar la primera ecuación por 2:</div>
    <div><strong>4x + 6y = 16</strong></div>
    <div><strong>4x - 5y = -2</strong></div>
</div>

<div class="question">
    <p><strong>Paso 2:</strong> ¿Qué debemos hacer ahora?</p>
    <div class="answers">
        <input type="radio" name="step2" id="step2a"><label for="step2a">a) Restar las ecuaciones para eliminar \(x\).</label><br>
        <input type="radio" name="step2" id="step2b"><label for="step2b">b) Sumar las ecuaciones para eliminar \(x\).</label><br>
        <input type="radio" name="step2" id="step2c"><label for="step2c">c) Multiplicar las ecuaciones para eliminar \(x\).</label><br>
        <input type="radio" name="step2" id="step2d"><label for="step2d">d) Cambiar los signos de ambas ecuaciones.</label><br>
    </div>
</div>

<div class="equation">
    <div>3) Sumando las ecuaciones:</div>
    <div><strong>11y = 18</strong></div>
</div>

<div class="question">
    <p><strong>Paso 3:</strong> ¿Qué debemos hacer ahora para despejar \(y\)?</p>
    <div class="answers">
        <input type="radio" name="step3" id="step3a"><label for="step3a">a) Despejar \(y\) dividiendo entre 11.</label><br>
        <input type="radio" name="step3" id="step3b"><label for="step3b">b) Sumar las ecuaciones nuevamente.</label><br>
        <input type="radio" name="step3" id="step3c"><label for="step3c">c) Multiplicar por 18.</label><br>
    </div>
</div>

<div class="equation">
    <div>4) Solución para \(y\):</div>
    <div><strong>y = 18/11</strong></div>
</div>

<div class="question">
    <p><strong>Paso 4:</strong> ¿Qué debemos hacer para continuar con la solución de \(x\)?</p>
    <div class="answers">
        <input type="radio" name="step4" id="step4a"><label for="step4a">a) Igualar los coeficientes de \(y\).</label><br>
        <input type="radio" name="step4" id="step4b"><label for="step4b">b) Multiplicar las ecuaciones por 5 y 3.</label><br>
        <input type="radio" name="step4" id="step4c"><label for="step4c">c) Sumar las ecuaciones para despejar \(x\).</label><br>
    </div>
</div>

<div class="equation">
    <div>5) Sistema de ecuaciones después de multiplicar para igualar los coeficientes de \(y\):</div>
    <div><strong>10x + 15y = 40</strong></div>
    <div><strong>12x - 15y = -6</strong></div>
</div>

<div class="question">
    <p><strong>Paso 5:</strong> ¿Qué debemos hacer ahora para eliminar \(y\)?</p>
    <div class="answers">
        <input type="radio" name="step5" id="step5a"><label for="step5a">a) Restar las ecuaciones para despejar \(x\).</label><br>
        <input type="radio" name="step5" id="step5b"><label for="step5b">b) Sumar las ecuaciones para despejar \(x\).</label><br>
    </div>
</div>

<div class="equation">
    <div>6) Sumando las ecuaciones:</div>
    <div><strong>22x = 34</strong></div>
</div>

<div class="question">
    <p><strong>Paso 6:</strong> ¿Qué debemos hacer para despejar \(x\)?</p>
    <div class="answers">
        <input type="radio" name="step6" id="step6a"><label for="step6a">a) Dividir entre 22.</label><br>
        <input type="radio" name="step6" id="step6b"><label for="step6b">b) Multiplicar por 22.</label><br>
    </div>
</div>

<div class="equation">
    <div>7) Solución para \(x\):</div>
    <div><strong>x = 17/11</strong></div>
</div>

<div class="question">
    <p><strong>Paso Final:</strong> ¿Cuál es la solución final del sistema?</p>
    <div class="answers">
        <input type="radio" name="stepfinal" id="stepfinala"><label for="stepfinala">a) \(x = 17/11\), \(y = 18/11\).</label><br>
        <input type="radio" name="stepfinal" id="stepfinalb"><label for="stepfinalb">b) \(x = 18/11\), \(y = 17/11\).</label><br>
        <input type="radio" name="stepfinal" id="stepfinalc"><label for="stepfinalc">c) \(x = 0\), \(y = 0\).</label><br>
    </div>
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English exam

English

1): Completar espacios (Past Simple y Past Continuous)

Instrucciones: Completa las oraciones con la forma correcta del verbo entre paréntesis. Usa Past Simple o Past Continuous según corresponda. 

  1. While she _______ (read), her phone _______ (ring). (Past Continuous, Past Simple)
  2. I _______ (go) to the park yesterday afternoon. (Past Simple)
  3. They _______ (not watch) TV when I called them. (Past Continuous)
  4. What _______ you _______ (do) at 8 p.m. last night? (Past Continuous)
  5. He _______ (fall) asleep while he _______ (study). (Past Simple, Past Continuous)

2) Choose the correct option. (Will or Be Going To)

  1. Look at those clouds! It _______ rain soon. (Be Going To)
  2. She thinks she _______ travel to Spain next year. (Will)
  3. "I’m thirsty." "I _______  get you some water." (Will)
  4. We _______ visit grandma next weekend; it’s already planned. (Be Going To)
  5. Do you think they _______ win the game? (Will)

3): Transformar oraciones

Instrucciones: Reescribe las oraciones en negativo y en pregunta. 

  1. He was reading a book.
    • Negativo: ______________________________
    • Pregunta: ______________________________
  2. They will visit their grandparents tomorrow.
    • Negativo: ______________________________
    • Pregunta: ______________________________
  3. She cooked dinner last night.
    • Negativo: ______________________________
    • Pregunta: ______________________________

5. Reading Comprehension

Instructions: Read the text and answer the questions.

Text:
"Last summer, Emily and her family went on a trip to Spain. While they were visiting Barcelona, they saw many interesting places. One afternoon, while Emily was taking photos of the Sagrada Familia, her brother got lost. He wasn’t paying attention and walked away from the group. Luckily, a kind stranger helped him find his way back. The whole family was very relieved when they found him."

Questions:

  1. Where did Emily’s family go?
  2. What was Emily doing?
  3. Why did her brother get lost?
  4. Who helped him?
  5. How did the family feel?

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