9x-3(2x+1)=-21

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Solution for 9x-3(2x+1)=-21 equation: 



9x-3(2x+1)=-21

We move all terms to the left:

9x-3(2x+1)-(-21)=0

We add all the numbers together, and all the variables

9x-3(2x+1)+21=0

We multiply parentheses

9x-6x-3+21=0

We add all the numbers together, and all the variables

3x+18=0

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

3x=-18

x=-18/3

x=-6

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