7c-9=8c+4

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Solution for 7c-9=8c+4 equation: 



7c-9=8c+4

We move all terms to the left:

7c-9-(8c+4)=0

We get rid of parentheses

7c-8c-4-9=0

We add all the numbers together, and all the variables

-1c-13=0

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

-c=13

c=13/-1

c=-13

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