-15=-3(c-1)+9

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Solution for -15=-3(c-1)+9 equation: 



-15=-3(c-1)+9

We move all terms to the left:

-15-(-3(c-1)+9)=0



We calculate terms in parentheses: -(-3(c-1)+9), so:

-3(c-1)+9

We multiply parentheses

-3c+3+9

We add all the numbers together, and all the variables

-3c+12

Back to the equation:

-(-3c+12)



We get rid of parentheses

3c-12-15=0

We add all the numbers together, and all the variables

3c-27=0

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

3c=27

c=27/3

c=9

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