(X+2x)/3=7

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Solution for (X+2x)/3=7 equation: 



(X+2X)/3=7

We move all terms to the left:

(X+2X)/3-(7)=0

We add all the numbers together, and all the variables

(+3X)/3-7=0

We multiply all the terms by the denominator


(+3X)-7*3=0

We add all the numbers together, and all the variables

(+3X)-21=0

We get rid of parentheses

3X-21=0

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

3X=21

X=21/3

X=7

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