Solve system by substitution

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  • Mathematics

  • Solving system of equations

  • Age 13+

  • level: b

  • English

คำแนะนำของผู้เขียน

Solve by substitution

1. y - 4x = 0        

   x + y = 5

 

 

2. -x + 2y = -6

   2x + y = 2

 

 

 

 

3. x = 3y + 9

   x = -4x + 2

 

 

 

 

 

 

4. 3x + y = 14

    x - 3y = -2