3(x+2x=18)

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



3(x+2x=18)

We move all terms to the left:

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

We add all the numbers together, and all the variables

3(3x-18)=0

We multiply parentheses

9x-54=0

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

9x=54

x=54/9

x=6

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