11x=9(20-x)

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Solution for 11x=9(20-x) equation: 



11x=9(20-x)

We move all terms to the left:

11x-(9(20-x))=0

We add all the numbers together, and all the variables

11x-(9(-1x+20))=0



We calculate terms in parentheses: -(9(-1x+20)), so:

9(-1x+20)

We multiply parentheses

-9x+180

Back to the equation:

-(-9x+180)



We get rid of parentheses

11x+9x-180=0

We add all the numbers together, and all the variables

20x-180=0

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

20x=180

x=180/20

x=9

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