Solve for z
z = \frac{5}{3} = 1\frac{2}{3} \approx 1.666666667
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55-9z=10\times 4
Multiply both sides by 4.
55-9z=40
Multiply 10 and 4 to get 40.
-9z=40-55
Subtract 55 from both sides.
-9z=-15
Subtract 55 from 40 to get -15.
z=\frac{-15}{-9}
Divide both sides by -9.
z=\frac{5}{3}
Reduce the fraction \frac{-15}{-9} to lowest terms by extracting and canceling out -3.
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