Solve for z
z=-\frac{1}{20}=-0.05
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15z=-\frac{3}{4}
Subtract \frac{3}{4} from both sides. Anything subtracted from zero gives its negation.
z=\frac{-\frac{3}{4}}{15}
Divide both sides by 15.
z=\frac{-3}{4\times 15}
Express \frac{-\frac{3}{4}}{15} as a single fraction.
z=\frac{-3}{60}
Multiply 4 and 15 to get 60.
z=-\frac{1}{20}
Reduce the fraction \frac{-3}{60} to lowest terms by extracting and canceling out 3.
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