1+7c=9c-9

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Solution for 1+7c=9c-9 equation: 



1+7c=9c-9

We move all terms to the left:

1+7c-(9c-9)=0

We get rid of parentheses

7c-9c+9+1=0

We add all the numbers together, and all the variables

-2c+10=0

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

-2c=-10

c=-10/-2

c=+5

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