Solve for n
n=10.2
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-10.5+2.5n=15
Add -12.5 and 2 to get -10.5.
2.5n=15+10.5
Add 10.5 to both sides.
2.5n=25.5
Add 15 and 10.5 to get 25.5.
n=\frac{25.5}{2.5}
Divide both sides by 2.5.
n=\frac{255}{25}
Expand \frac{25.5}{2.5} by multiplying both numerator and the denominator by 10.
n=\frac{51}{5}
Reduce the fraction \frac{255}{25} to lowest terms by extracting and canceling out 5.
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