Solve for r
r=-3.5
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16.1-2.4r=24.5
Swap sides so that all variable terms are on the left hand side.
-2.4r=24.5-16.1
Subtract 16.1 from both sides.
-2.4r=8.4
Subtract 16.1 from 24.5 to get 8.4.
r=\frac{8.4}{-2.4}
Divide both sides by -2.4.
r=\frac{84}{-24}
Expand \frac{8.4}{-2.4} by multiplying both numerator and the denominator by 10.
r=-\frac{7}{2}
Reduce the fraction \frac{84}{-24} to lowest terms by extracting and canceling out 12.
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