180=(100-x)+2x+x

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Solution for 180=(100-x)+2x+x equation: 



180=(100-x)+2x+x

We move all terms to the left:

180-((100-x)+2x+x)=0

We add all the numbers together, and all the variables

-((-1x+100)+2x+x)+180=0



We calculate terms in parentheses: -((-1x+100)+2x+x), so:

(-1x+100)+2x+x

We add all the numbers together, and all the variables

3x+(-1x+100)

We get rid of parentheses

3x-1x+100

We add all the numbers together, and all the variables

2x+100

Back to the equation:

-(2x+100)



We get rid of parentheses

-2x-100+180=0

We add all the numbers together, and all the variables

-2x+80=0

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

-2x=-80

x=-80/-2

x=+40

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