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
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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