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Solve for b
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Solve for a
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-b=8-a
Subtract a from both sides.
\frac{-b}{-1}=\frac{8-a}{-1}
Divide both sides by -1.
b=\frac{8-a}{-1}
Dividing by -1 undoes the multiplication by -1.
b=a-8
Divide 8-a by -1.
a=8+b
Add b to both sides.