21+3c=-4c+28

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Solution for 21+3c=-4c+28 equation: 



21+3c=-4c+28

We move all terms to the left:

21+3c-(-4c+28)=0

We get rid of parentheses

3c+4c-28+21=0

We add all the numbers together, and all the variables

7c-7=0

We move all terms containing c to the left, all other terms to the right

7c=7

c=7/7

c=1

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