Solve for y
y=\frac{x}{9}
x\neq 0
Solve for x
x=9y
y\neq 0
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x=9y
Variable y cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by y.
9y=x
Swap sides so that all variable terms are on the left hand side.
\frac{9y}{9}=\frac{x}{9}
Divide both sides by 9.
y=\frac{x}{9}
Dividing by 9 undoes the multiplication by 9.
y=\frac{x}{9}\text{, }y\neq 0
Variable y cannot be equal to 0.
x=9y
Multiply both sides of the equation by y.
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Limits
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