9+c=-2c

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Solution for 9+c=-2c equation: 



9+c=-2c

We move all terms to the left:

9+c-(-2c)=0

We get rid of parentheses

c+2c+9=0

We add all the numbers together, and all the variables

3c+9=0

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

3c=-9

c=-9/3

c=-3

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