(c-12)=-21

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Solution for (c-12)=-21 equation: 



(c-12)=-21

We move all terms to the left:

(c-12)-(-21)=0

We add all the numbers together, and all the variables

(c-12)+21=0

We get rid of parentheses

c-12+21=0

We add all the numbers together, and all the variables

c+9=0

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

c=-9

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