Solve for b
b=4-2x
Solve for x
x=-\frac{b}{2}+2
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2b=8-4x
Subtract 4x from both sides.
\frac{2b}{2}=\frac{8-4x}{2}
Divide both sides by 2.
b=\frac{8-4x}{2}
Dividing by 2 undoes the multiplication by 2.
b=4-2x
Divide 8-4x by 2.
4x=8-2b
Subtract 2b from both sides.
\frac{4x}{4}=\frac{8-2b}{4}
Divide both sides by 4.
x=\frac{8-2b}{4}
Dividing by 4 undoes the multiplication by 4.
x=-\frac{b}{2}+2
Divide 8-2b by 4.
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