Solve for y
y=\frac{x-7}{3}
Solve for x
x=3y+7
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3y+7=x
Swap sides so that all variable terms are on the left hand side.
3y=x-7
Subtract 7 from both sides.
\frac{3y}{3}=\frac{x-7}{3}
Divide both sides by 3.
y=\frac{x-7}{3}
Dividing by 3 undoes the multiplication by 3.
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Limits
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