Solve for a
a=\frac{2}{5b}
b\neq 0
Solve for b
b=\frac{2}{5a}
a\neq 0
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ba=0.4
The equation is in standard form.
\frac{ba}{b}=\frac{0.4}{b}
Divide both sides by b.
a=\frac{0.4}{b}
Dividing by b undoes the multiplication by b.
a=\frac{2}{5b}
Divide 0.4 by b.
ab=0.4
The equation is in standard form.
\frac{ab}{a}=\frac{0.4}{a}
Divide both sides by a.
b=\frac{0.4}{a}
Dividing by a undoes the multiplication by a.
b=\frac{2}{5a}
Divide 0.4 by a.
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