x+x*2=640

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Solution for x+x*2=640 equation: 



x+x*2=640

We move all terms to the left:

x+x*2-(640)=0

Wy multiply elements

x+2x-640=0

We add all the numbers together, and all the variables

3x-640=0

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

3x=640

x=640/3

x=213+1/3

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