Solve for b
b=-\frac{a}{3}
Solve for a
a=-3b
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-3b=a
The equation is in standard form.
\frac{-3b}{-3}=\frac{a}{-3}
Divide both sides by -3.
b=\frac{a}{-3}
Dividing by -3 undoes the multiplication by -3.
b=-\frac{a}{3}
Divide a by -3.
a=-3b
Swap sides so that all variable terms are on the left hand side.
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