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Rearrange before substitution:

7x - y = -5

Would it be: -y= 5 - 7x?

4 answers

Yes.

How would you plug it into 5x - 3y = 1

Would it be: 5x - 3(-5 - 7x) = 1?

We'll, this is the whole problem:
Use substitution to solve for x and y:

{5x - 3y =1
{7x - y = -5

The answer is suppose to be (-1,-2)

Nevermind I got the answer

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