Solve for r
r = -\frac{7}{2} = -3\frac{1}{2} = -3.5
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161-24r=245
Swap sides so that all variable terms are on the left hand side.
-24r=245-161
Subtract 161 from both sides.
-24r=84
Subtract 161 from 245 to get 84.
r=\frac{84}{-24}
Divide both sides by -24.
r=-\frac{7}{2}
Reduce the fraction \frac{84}{-24} to lowest terms by extracting and canceling out 12.
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