-3x-2(-3x+18)=-21

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



-3x-2(-3x+18)=-21

We move all terms to the left:

-3x-2(-3x+18)-(-21)=0

We add all the numbers together, and all the variables

-3x-2(-3x+18)+21=0

We multiply parentheses

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

We add all the numbers together, and all the variables

3x-15=0

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

3x=15

x=15/3

x=5

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