3 years ago

Solve using substitution method 2x+2y=-3 2×-y=5

1 answer:

6 0

A) 2x + 2y = -3
B) 2x -y = 5
B) y = 2x -5
Substituting equation B into A
A) 2x +2*(2x-5) = -3
2x + 4x -10 = -3
6x = 7
x = 1.16666666
y = 2*1.16666667 -5
y = -2.66666666

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