Solve for z
z=-300
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\frac{-21}{0.07}=z
Divide both sides by 0.07.
\frac{-2100}{7}=z
Expand \frac{-21}{0.07} by multiplying both numerator and the denominator by 100.
-300=z
Divide -2100 by 7 to get -300.
z=-300
Swap sides so that all variable terms are on the left hand side.
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