Solve for z
z = \frac{1402}{67} = 20\frac{62}{67} \approx 20.925373134
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z+4=\frac{16.7}{0.67}
Divide both sides by 0.67.
z+4=\frac{1670}{67}
Expand \frac{16.7}{0.67} by multiplying both numerator and the denominator by 100.
z=\frac{1670}{67}-4
Subtract 4 from both sides.
z=\frac{1670}{67}-\frac{268}{67}
Convert 4 to fraction \frac{268}{67}.
z=\frac{1670-268}{67}
Since \frac{1670}{67} and \frac{268}{67} have the same denominator, subtract them by subtracting their numerators.
z=\frac{1402}{67}
Subtract 268 from 1670 to get 1402.
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