Question

Which system of equations is equivalent to the system of equations shown? 2x + 5y = -2 4x + 7y = 8

Answer 1

x=9, y=-4. (9, -4).

Explanation:

2x+5y=-2

4x+7y=8

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-2(2x+5y)=-2(-2)

4x+7y=8

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-4x-10y=4

4x+7y=8

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-3y=12

y=12/-3

y=-4

2x+5(-4)=-2

2x-20=-2

2x=-2+20

2x=18

x=18/2

x=9