-12=-2(c-9)

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Solution for -12=-2(c-9) equation: 



-12=-2(c-9)

We move all terms to the left:

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



We calculate terms in parentheses: -(-2(c-9)), so:

-2(c-9)

We multiply parentheses

-2c+18

Back to the equation:

-(-2c+18)



We get rid of parentheses

2c-18-12=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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