Solve for x
x=81y
Solve for y
y=\frac{x}{81}
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\frac{x}{81}=y
Swap sides so that all variable terms are on the left hand side.
\frac{1}{81}x=y
The equation is in standard form.
\frac{\frac{1}{81}x}{\frac{1}{81}}=\frac{y}{\frac{1}{81}}
Multiply both sides by 81.
x=\frac{y}{\frac{1}{81}}
Dividing by \frac{1}{81} undoes the multiplication by \frac{1}{81}.
x=81y
Divide y by \frac{1}{81} by multiplying y by the reciprocal of \frac{1}{81}.
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