Solve for n
n=\frac{x-66}{4}
Solve for x
x=4n+66
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4n+66=x
Swap sides so that all variable terms are on the left hand side.
4n=x-66
Subtract 66 from both sides.
\frac{4n}{4}=\frac{x-66}{4}
Divide both sides by 4.
n=\frac{x-66}{4}
Dividing by 4 undoes the multiplication by 4.
n=\frac{x}{4}-\frac{33}{2}
Divide x-66 by 4.
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