x+2x=x+7=4x-x+2

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Solution for x+2x=x+7=4x-x+2 equation: 



x+2x=x+7=4x-x+2

We move all terms to the left:

x+2x-(x+7)=0

We add all the numbers together, and all the variables

3x-(x+7)=0

We get rid of parentheses

3x-x-7=0

We add all the numbers together, and all the variables

2x-7=0

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

2x=7

x=7/2

x=3+1/2

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