Solve for x
x=3\left(y+1\right)
Solve for y
y=\frac{x-3}{3}
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x=3y+4-1
Subtract 1 from both sides.
x=3y+3
Subtract 1 from 4 to get 3.
3y+4=x+1
Swap sides so that all variable terms are on the left hand side.
3y=x+1-4
Subtract 4 from both sides.
3y=x-3
Subtract 4 from 1 to get -3.
\frac{3y}{3}=\frac{x-3}{3}
Divide both sides by 3.
y=\frac{x-3}{3}
Dividing by 3 undoes the multiplication by 3.
y=\frac{x}{3}-1
Divide x-3 by 3.
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