Solve for n
n=-12
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7n+15-5n=-9
Subtract 5n from both sides.
2n+15=-9
Combine 7n and -5n to get 2n.
2n=-9-15
Subtract 15 from both sides.
2n=-24
Subtract 15 from -9 to get -24.
n=\frac{-24}{2}
Divide both sides by 2.
n=-12
Divide -24 by 2 to get -12.
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