Solve for x
x=-\frac{b}{2}+6
Solve for b
b=12-2x
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2x=12-b
Subtract b from both sides.
\frac{2x}{2}=\frac{12-b}{2}
Divide both sides by 2.
x=\frac{12-b}{2}
Dividing by 2 undoes the multiplication by 2.
x=-\frac{b}{2}+6
Divide 12-b by 2.
b=12-2x
Subtract 2x from both sides.
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