Solve for g
g = \frac{9}{2} = 4\frac{1}{2} = 4.5
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90=20g
Divide 900 by 10 to get 90.
20g=90
Swap sides so that all variable terms are on the left hand side.
g=\frac{90}{20}
Divide both sides by 20.
g=\frac{9}{2}
Reduce the fraction \frac{90}{20} to lowest terms by extracting and canceling out 10.
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