3 years ago

Solve the systems of equations by substituting y=-5 5x+4y=-20

1 answer:

8 0

5x + 4y = -20
5x + 4(-5) = -20
5x -20 = -20
5x = 0
x = 0

5x + 4y = -20
4y = -5x -20
4y = -5(0) -20
4y = -20
y = -5

(x , y) = (0 , -5)

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