Solve for n_5
n_{5}=20
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\frac{4200}{3500}=1+\frac{n_{5}}{100}
Divide both sides by 3500.
\frac{6}{5}=1+\frac{n_{5}}{100}
Reduce the fraction \frac{4200}{3500} to lowest terms by extracting and canceling out 700.
120=100+n_{5}
Multiply both sides of the equation by 100, the least common multiple of 5,100.
100+n_{5}=120
Swap sides so that all variable terms are on the left hand side.
n_{5}=120-100
Subtract 100 from both sides.
n_{5}=20
Subtract 100 from 120 to get 20.
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