Solve for a
a=15c
Solve for c
c=\frac{a}{15}
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2a=30c
Swap sides so that all variable terms are on the left hand side.
\frac{2a}{2}=\frac{30c}{2}
Divide both sides by 2.
a=\frac{30c}{2}
Dividing by 2 undoes the multiplication by 2.
a=15c
Divide 30c by 2.
30c=2a
The equation is in standard form.
\frac{30c}{30}=\frac{2a}{30}
Divide both sides by 30.
c=\frac{2a}{30}
Dividing by 30 undoes the multiplication by 30.
c=\frac{a}{15}
Divide 2a by 30.
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