6c-8c+7=+21

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Solution for 6c-8c+7=+21 equation: 



6c-8c+7=+21

We move all terms to the left:

6c-8c+7-(+21)=0

We add all the numbers together, and all the variables

6c-8c+7-21=0

We add all the numbers together, and all the variables

-2c-14=0

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

-2c=14

c=14/-2

c=-7

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