-20=-2(c+7)

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Solution for -20=-2(c+7) equation: 



-20=-2(c+7)

We move all terms to the left:

-20-(-2(c+7))=0



We calculate terms in parentheses: -(-2(c+7)), so:

-2(c+7)

We multiply parentheses

-2c-14

Back to the equation:

-(-2c-14)



We get rid of parentheses

2c+14-20=0

We add all the numbers together, and all the variables

2c-6=0

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

2c=6

c=6/2

c=3

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