Solve for a
a=-\frac{4b}{5}+12
Solve for b
b=-\frac{5a}{4}+15
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5a=60-4b
Subtract 4b from both sides.
\frac{5a}{5}=\frac{60-4b}{5}
Divide both sides by 5.
a=\frac{60-4b}{5}
Dividing by 5 undoes the multiplication by 5.
a=-\frac{4b}{5}+12
Divide 60-4b by 5.
4b=60-5a
Subtract 5a from both sides.
\frac{4b}{4}=\frac{60-5a}{4}
Divide both sides by 4.
b=\frac{60-5a}{4}
Dividing by 4 undoes the multiplication by 4.
b=-\frac{5a}{4}+15
Divide 60-5a by 4.
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