Solve for b
b=-\frac{3p}{5}+8400
Solve for p
p=-\frac{5b}{3}+14000
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5b=42000-3p
Subtract 3p from both sides.
\frac{5b}{5}=\frac{42000-3p}{5}
Divide both sides by 5.
b=\frac{42000-3p}{5}
Dividing by 5 undoes the multiplication by 5.
b=-\frac{3p}{5}+8400
Divide 42000-3p by 5.
3p=42000-5b
Subtract 5b from both sides.
\frac{3p}{3}=\frac{42000-5b}{3}
Divide both sides by 3.
p=\frac{42000-5b}{3}
Dividing by 3 undoes the multiplication by 3.
p=-\frac{5b}{3}+14000
Divide 42000-5b by 3.
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