18=-3(7+c)+3

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Solution for 18=-3(7+c)+3 equation: 



18=-3(7+c)+3

We move all terms to the left:

18-(-3(7+c)+3)=0

We add all the numbers together, and all the variables

-(-3(c+7)+3)+18=0



We calculate terms in parentheses: -(-3(c+7)+3), so:

-3(c+7)+3

We multiply parentheses

-3c-21+3

We add all the numbers together, and all the variables

-3c-18

Back to the equation:

-(-3c-18)



We get rid of parentheses

3c+18+18=0

We add all the numbers together, and all the variables

3c+36=0

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

3c=-36

c=-36/3

c=-12

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