7c-7+6c-8=90

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Solution for 7c-7+6c-8=90 equation: 



7c-7+6c-8=90

We move all terms to the left:

7c-7+6c-8-(90)=0

We add all the numbers together, and all the variables

13c-105=0

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

13c=105

c=105/13

c=8+1/13

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