Solve for a
a=\frac{32-b}{3}
Solve for b
b=32-3a
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3a+b=32
Swap sides so that all variable terms are on the left hand side.
3a=32-b
Subtract b from both sides.
\frac{3a}{3}=\frac{32-b}{3}
Divide both sides by 3.
a=\frac{32-b}{3}
Dividing by 3 undoes the multiplication by 3.
3a+b=32
Swap sides so that all variable terms are on the left hand side.
b=32-3a
Subtract 3a from both sides.
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