-2c-21=-7

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Solution for -2c-21=-7 equation: 



-2c-21=-7

We move all terms to the left:

-2c-21-(-7)=0

We add all the numbers together, and all the variables

-2c-14=0

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

-2c=14

c=14/-2

c=-7

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