Solve for c
c = -\frac{9}{8} = -1\frac{1}{8} = -1.125
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c\left(-10\right)\times 40=5\left(-10\right)+500
Add -10 and 50 to get 40.
c\left(-400\right)=5\left(-10\right)+500
Multiply -10 and 40 to get -400.
c\left(-400\right)=-50+500
Multiply 5 and -10 to get -50.
c\left(-400\right)=450
Add -50 and 500 to get 450.
c=\frac{450}{-400}
Divide both sides by -400.
c=-\frac{9}{8}
Reduce the fraction \frac{450}{-400} to lowest terms by extracting and canceling out 50.
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