3(x+2)+3(x-1)=84

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Solution for 3(x+2)+3(x-1)=84 equation: 



3(x+2)+3(x-1)=84

We move all terms to the left:

3(x+2)+3(x-1)-(84)=0

We multiply parentheses

3x+3x+6-3-84=0

We add all the numbers together, and all the variables

6x-81=0

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

6x=81

x=81/6

x=13+1/2

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