2c+9=-9-3-c

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Solution for 2c+9=-9-3-c equation: 



2c+9=-9-3-c

We move all terms to the left:

2c+9-(-9-3-c)=0

We add all the numbers together, and all the variables

2c-(-1c-12)+9=0

We get rid of parentheses

2c+1c+12+9=0

We add all the numbers together, and all the variables

3c+21=0

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

3c=-21

c=-21/3

c=-7

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