180-x=80+3(90-x)

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Solution for 180-x=80+3(90-x) equation: 



180-x=80+3(90-x)

We move all terms to the left:

180-x-(80+3(90-x))=0

We add all the numbers together, and all the variables

-x-(80+3(-1x+90))+180=0

We add all the numbers together, and all the variables

-1x-(80+3(-1x+90))+180=0



We calculate terms in parentheses: -(80+3(-1x+90)), so:

80+3(-1x+90)

determiningTheFunctionDomain
3(-1x+90)+80

We multiply parentheses

-3x+270+80

We add all the numbers together, and all the variables

-3x+350

Back to the equation:

-(-3x+350)



We get rid of parentheses

-1x+3x-350+180=0

We add all the numbers together, and all the variables

2x-170=0

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

2x=170

x=170/2

x=85

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