3(c-1)+2(-3c+18)=-21

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Solution for 3(c-1)+2(-3c+18)=-21 equation: 



3(c-1)+2(-3c+18)=-21

We move all terms to the left:

3(c-1)+2(-3c+18)-(-21)=0

We add all the numbers together, and all the variables

3(c-1)+2(-3c+18)+21=0

We multiply parentheses

3c-6c-3+36+21=0

We add all the numbers together, and all the variables

-3c+54=0

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

-3c=-54

c=-54/-3

c=+18

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