Solve for z
z=\frac{2}{3}\approx 0.666666667
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6z=13-9
Subtract 9 from both sides.
6z=4
Subtract 9 from 13 to get 4.
z=\frac{4}{6}
Divide both sides by 6.
z=\frac{2}{3}
Reduce the fraction \frac{4}{6} to lowest terms by extracting and canceling out 2.
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