21-4c=8c-9

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Solution for 21-4c=8c-9 equation:


21-4c=8c-9

We simplify the equation to the form, which is simple to understand 
21-4c=8c-9

We move all terms containing c to the left and all other terms to the right. 
-4c-8c=-9-21

We simplify left and right side of the equation. 
-12c=-30

We divide both sides of the equation by -12 to get c. 
c=2.5

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