\frac { c } { 5 } = \frac { 47,7 - 72 } { 9 }
Solve for c
c=-13,5
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9c=5\left(47,7-72\right)
Multiply both sides of the equation by 45, the least common multiple of 5;9.
9c=5\left(-24,3\right)
Subtract 72 from 47,7 to get -24,3.
9c=-121,5
Multiply 5 and -24,3 to get -121,5.
c=\frac{-121,5}{9}
Divide both sides by 9.
c=\frac{-1215}{90}
Expand \frac{-121,5}{9} by multiplying both numerator and the denominator by 10.
c=-\frac{27}{2}
Reduce the fraction \frac{-1215}{90} to lowest terms by extracting and canceling out 45.
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