I will assume you are solving.
8y=7+14x ---> 14x - 8y = -7
18y-2=-7x --> 7x + 18y = 2
I suggest multiplying the 2nd by 2, then subtracting them.
That will eliminate the x's , then solve for y.
You know what to do next.
8y=7+14x
18y-2=-7x
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