Solve for s
s=\frac{S}{15}
Solve for S
S=15s
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S=15s
Divide 30s by 2 to get 15s.
15s=S
Swap sides so that all variable terms are on the left hand side.
\frac{15s}{15}=\frac{S}{15}
Divide both sides by 15.
s=\frac{S}{15}
Dividing by 15 undoes the multiplication by 15.
S=15s
Divide 30s by 2 to get 15s.
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