Solve for A
A=\frac{5b}{2}
Solve for b
b=\frac{2A}{5}
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20A=50b
Multiply both sides of the equation by 100.
\frac{20A}{20}=\frac{50b}{20}
Divide both sides by 20.
A=\frac{50b}{20}
Dividing by 20 undoes the multiplication by 20.
A=\frac{5b}{2}
Divide 50b by 20.
20A=50b
Multiply both sides of the equation by 100.
50b=20A
Swap sides so that all variable terms are on the left hand side.
\frac{50b}{50}=\frac{20A}{50}
Divide both sides by 50.
b=\frac{20A}{50}
Dividing by 50 undoes the multiplication by 50.
b=\frac{2A}{5}
Divide 20A by 50.
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