how to slove it

Do you need to multiply by -1?

2x-y=-7

-2x-3y=-13
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1 Answer

Add the two equations: -4y=-20, 4y=20, y=5.

2x-y=-7, 2x-5=-7, 2x=-2, x=-1.

SOLUTION: x=-1, 5.
by Top Rated User (1.2m points)

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