Solve for c
c=0
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5=\frac{10}{2}+c
Multiply \frac{1}{2} and 10 to get \frac{10}{2}.
5=5+c
Divide 10 by 2 to get 5.
5+c=5
Swap sides so that all variable terms are on the left hand side.
c=5-5
Subtract 5 from both sides.
c=0
Subtract 5 from 5 to get 0.
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