2c+9=-21

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Solution for 2c+9=-21 equation: 



2c+9=-21

We move all terms to the left:

2c+9-(-21)=0

We add all the numbers together, and all the variables

2c+30=0

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

2c=-30

c=-30/2

c=-15

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