4c-7=21

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Solution for 4c-7=21 equation: 



4c-7=21

We move all terms to the left:

4c-7-(21)=0

We add all the numbers together, and all the variables

4c-28=0

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

4c=28

c=28/4

c=7

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