(90-x)=2x=x=180

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Solution for (90-x)=2x=x=180 equation: 



(90-x)=2x=x=180

We move all terms to the left:

(90-x)-(2x)=0

We add all the numbers together, and all the variables

(-1x+90)-2x=0

We add all the numbers together, and all the variables

-2x+(-1x+90)=0

We get rid of parentheses

-2x-1x+90=0

We add all the numbers together, and all the variables

-3x+90=0

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

-3x=-90

x=-90/-3

x=+30

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