x=20(90-x)

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Solution for x=20(90-x) equation: 



x=20(90-x)

We move all terms to the left:

x-(20(90-x))=0

We add all the numbers together, and all the variables

x-(20(-1x+90))=0



We calculate terms in parentheses: -(20(-1x+90)), so:

20(-1x+90)

We multiply parentheses

-20x+1800

Back to the equation:

-(-20x+1800)



We get rid of parentheses

x+20x-1800=0

We add all the numbers together, and all the variables

21x-1800=0

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

21x=1800

x=1800/21

x=85+5/7

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