(180-x)*3=(90-x)*8

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Solution for (180-x)*3=(90-x)*8 equation: 



(180-x)*3=(90-x)*8

We move all terms to the left:

(180-x)*3-((90-x)*8)=0

We add all the numbers together, and all the variables

(-1x+180)*3-((-1x+90)*8)=0

We multiply parentheses

-3x-((-1x+90)*8)+540=0



We calculate terms in parentheses: -((-1x+90)*8), so:

(-1x+90)*8

We multiply parentheses

-8x+720

Back to the equation:

-(-8x+720)



We get rid of parentheses

-3x+8x-720+540=0

We add all the numbers together, and all the variables

5x-180=0

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

5x=180

x=180/5

x=36

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