Solve for A
A = \frac{41}{2} = 20\frac{1}{2} = 20.5
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A\times 4=91-9
Subtract 9 from both sides.
A\times 4=82
Subtract 9 from 91 to get 82.
A=\frac{82}{4}
Divide both sides by 4.
A=\frac{41}{2}
Reduce the fraction \frac{82}{4} to lowest terms by extracting and canceling out 2.
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