(90-x)=x+0.25x

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Solution for (90-x)=x+0.25x equation: 



(90-x)=x+0.25x

We move all terms to the left:

(90-x)-(x+0.25x)=0

We add all the numbers together, and all the variables

(-1x+90)-(+1.25x)=0

We get rid of parentheses

-1x-1.25x+90=0

We add all the numbers together, and all the variables

-2.25x+90=0

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

-2.25x=-90

x=-90/-2.25

x=+40

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