Solve for x
x=-12
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-9-x=15+x
Subtract 13 from 4 to get -9.
-9-x-x=15
Subtract x from both sides.
-9-2x=15
Combine -x and -x to get -2x.
-2x=15+9
Add 9 to both sides.
-2x=24
Add 15 and 9 to get 24.
x=\frac{24}{-2}
Divide both sides by -2.
x=-12
Divide 24 by -2 to get -12.
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