-2c+63=-21

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Solution for -2c+63=-21 equation: 



-2c+63=-21

We move all terms to the left:

-2c+63-(-21)=0

We add all the numbers together, and all the variables

-2c+84=0

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

-2c=-84

c=-84/-2

c=+42

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