150-x-2x=120-2x

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Solution for 150-x-2x=120-2x equation: 



150-x-2x=120-2x

We move all terms to the left:

150-x-2x-(120-2x)=0

We add all the numbers together, and all the variables

-x-2x-(-2x+120)+150=0

We add all the numbers together, and all the variables

-3x-(-2x+120)+150=0

We get rid of parentheses

-3x+2x-120+150=0

We add all the numbers together, and all the variables

-1x+30=0

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

-x=-30

x=-30/-1

x=+30

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