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Solve for a
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Solve for b
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3a=-4b
Subtract 4b from both sides. Anything subtracted from zero gives its negation.
\frac{3a}{3}=-\frac{4b}{3}
Divide both sides by 3.
a=-\frac{4b}{3}
Dividing by 3 undoes the multiplication by 3.
4b=-3a
Subtract 3a from both sides. Anything subtracted from zero gives its negation.
\frac{4b}{4}=-\frac{3a}{4}
Divide both sides by 4.
b=-\frac{3a}{4}
Dividing by 4 undoes the multiplication by 4.