-7=c-8c

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Solution for -7=c-8c equation: 



-7=c-8c

We move all terms to the left:

-7-(c-8c)=0

We add all the numbers together, and all the variables

-(-7c)-7=0

We get rid of parentheses

7c-7=0

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

7c=7

c=7/7

c=1

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