-7=20+c

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Solution for -7=20+c equation: 



-7=20+c

We move all terms to the left:

-7-(20+c)=0

We add all the numbers together, and all the variables

-(c+20)-7=0

We get rid of parentheses

-c-20-7=0

We add all the numbers together, and all the variables

-1c-27=0

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

-c=27

c=27/-1

c=-27

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