-2c-9=31

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Solution for -2c-9=31 equation: 



-2c-9=31

We move all terms to the left:

-2c-9-(31)=0

We add all the numbers together, and all the variables

-2c-40=0

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

-2c=40

c=40/-2

c=-20

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