(x+2x)*2=42

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Solution for (x+2x)*2=42 equation: 



(x+2x)*2=42

We move all terms to the left:

(x+2x)*2-(42)=0

We add all the numbers together, and all the variables

(+3x)*2-42=0

We multiply parentheses

6x-42=0

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

6x=42

x=42/6

x=7

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