(180-3x)=(x+20)

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Solution for (180-3x)=(x+20) equation: 



(180-3x)=(x+20)

We move all terms to the left:

(180-3x)-((x+20))=0

We add all the numbers together, and all the variables

(-3x+180)-((x+20))=0

We get rid of parentheses

-3x-((x+20))+180=0



We calculate terms in parentheses: -((x+20)), so:

(x+20)

We get rid of parentheses

x+20

Back to the equation:

-(x+20)



We get rid of parentheses

-3x-x-20+180=0

We add all the numbers together, and all the variables

-4x+160=0

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

-4x=-160

x=-160/-4

x=+40

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