-9c=-7-8c

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Solution for -9c=-7-8c equation: 



-9c=-7-8c

We move all terms to the left:

-9c-(-7-8c)=0

We add all the numbers together, and all the variables

-9c-(-8c-7)=0

We get rid of parentheses

-9c+8c+7=0

We add all the numbers together, and all the variables

-1c+7=0

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

-c=-7

c=-7/-1

c=+7

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