Solve for x
x=3-3y
Solve for y
y=-\frac{x}{3}+1
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3x=9-9y
Subtract 9y from both sides.
\frac{3x}{3}=\frac{9-9y}{3}
Divide both sides by 3.
x=\frac{9-9y}{3}
Dividing by 3 undoes the multiplication by 3.
x=3-3y
Divide 9-9y by 3.
9y=9-3x
Subtract 3x from both sides.
\frac{9y}{9}=\frac{9-3x}{9}
Divide both sides by 9.
y=\frac{9-3x}{9}
Dividing by 9 undoes the multiplication by 9.
y=-\frac{x}{3}+1
Divide 9-3x by 9.
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