Solve for c
c = \frac{169}{12} = 14\frac{1}{12} \approx 14.083333333
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\sqrt{c\times 12}=13
Swap sides so that all variable terms are on the left hand side.
12c=169
Square both sides of the equation.
\frac{12c}{12}=\frac{169}{12}
Divide both sides by 12.
c=\frac{169}{12}
Dividing by 12 undoes the multiplication by 12.
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