Solve for c
c=\frac{7}{13}\approx 0.538461538
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-13c+18=18-7
Combine -4c and -9c to get -13c.
-13c+18=11
Subtract 7 from 18 to get 11.
-13c=11-18
Subtract 18 from both sides.
-13c=-7
Subtract 18 from 11 to get -7.
c=\frac{-7}{-13}
Divide both sides by -13.
c=\frac{7}{13}
Fraction \frac{-7}{-13} can be simplified to \frac{7}{13} by removing the negative sign from both the numerator and the denominator.
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