Solve for z
z=-\frac{y}{2}+3
Solve for y
y=6-2z
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2z=6-y
Subtract y from both sides.
\frac{2z}{2}=\frac{6-y}{2}
Divide both sides by 2.
z=\frac{6-y}{2}
Dividing by 2 undoes the multiplication by 2.
z=-\frac{y}{2}+3
Divide 6-y by 2.
y=6-2z
Subtract 2z from both sides.
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