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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

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



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

3(-1x+90)-80

We multiply parentheses

-3x+270-80

We add all the numbers together, and all the variables

-3x+190

Back to the equation:

-(-3x+190)



We get rid of parentheses

-1x+3x-190+180=0

We add all the numbers together, and all the variables

2x-10=0

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

2x=10

x=10/2

x=5

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