Solve for x
x=\frac{c-20}{5}
Solve for c
c=5\left(x+4\right)
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-5x=20-c
Subtract c from both sides.
\frac{-5x}{-5}=\frac{20-c}{-5}
Divide both sides by -5.
x=\frac{20-c}{-5}
Dividing by -5 undoes the multiplication by -5.
x=\frac{c}{5}-4
Divide 20-c by -5.
c=20+5x
Add 5x to both sides.
Examples
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Limits
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