3(120-x)=x

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Solution for 3(120-x)=x equation: 



3(120-x)=x

We move all terms to the left:

3(120-x)-(x)=0

We add all the numbers together, and all the variables

3(-1x+120)-x=0

We add all the numbers together, and all the variables

-1x+3(-1x+120)=0

We multiply parentheses

-1x-3x+360=0

We add all the numbers together, and all the variables

-4x+360=0

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

-4x=-360

x=-360/-4

x=+90

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