If you mean: -2y-3-y+2 then it can be simplified to -1-3y
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You can't. You need 2 equations to solve for 2 unknowns
4
2y = 4 (divide both sides by 2 to solve) y = 2
You cannot solve it since it is not a true equation.
First, solve for y.y=-8xif x=2, then y=-16.