Solve for x
x=\frac{y+1}{3}
Solve for y
y=3x-1
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9x-3=3y
Swap sides so that all variable terms are on the left hand side.
9x=3y+3
Add 3 to both sides.
\frac{9x}{9}=\frac{3y+3}{9}
Divide both sides by 9.
x=\frac{3y+3}{9}
Dividing by 9 undoes the multiplication by 9.
x=\frac{y+1}{3}
Divide 3+3y by 9.
3y=9x-3
The equation is in standard form.
\frac{3y}{3}=\frac{9x-3}{3}
Divide both sides by 3.
y=\frac{9x-3}{3}
Dividing by 3 undoes the multiplication by 3.
y=3x-1
Divide 9x-3 by 3.
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