Solve for x
x=\frac{y+1}{72}
Solve for y
y=72x-1
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72x-1=y
Swap sides so that all variable terms are on the left hand side.
72x=y+1
Add 1 to both sides.
\frac{72x}{72}=\frac{y+1}{72}
Divide both sides by 72.
x=\frac{y+1}{72}
Dividing by 72 undoes the multiplication by 72.
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