x+(2x)=84

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Solution for x+(2x)=84 equation: 



x+(2x)=84

We move all terms to the left:

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

We add all the numbers together, and all the variables

3x-84=0

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

3x=84

x=84/3

x=28

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