Solve for a
a=\frac{3s}{7}
s\neq 0
Solve for s
s=\frac{7a}{3}
a\neq 0
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3s=7a
Variable a cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by a.
7a=3s
Swap sides so that all variable terms are on the left hand side.
\frac{7a}{7}=\frac{3s}{7}
Divide both sides by 7.
a=\frac{3s}{7}
Dividing by 7 undoes the multiplication by 7.
a=\frac{3s}{7}\text{, }a\neq 0
Variable a cannot be equal to 0.
3s=7a
Multiply both sides of the equation by a.
\frac{3s}{3}=\frac{7a}{3}
Divide both sides by 3.
s=\frac{7a}{3}
Dividing by 3 undoes the multiplication by 3.
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