Solve for n
n=-3
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3n-15=8n
Combine 7n and n to get 8n.
3n-15-8n=0
Subtract 8n from both sides.
-5n-15=0
Combine 3n and -8n to get -5n.
-5n=15
Add 15 to both sides. Anything plus zero gives itself.
n=\frac{15}{-5}
Divide both sides by -5.
n=-3
Divide 15 by -5 to get -3.
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Limits
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