90(x-40)=x

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Solution for 90(x-40)=x equation: 



90(x-40)=x

We move all terms to the left:

90(x-40)-(x)=0

We add all the numbers together, and all the variables

-1x+90(x-40)=0

We multiply parentheses

-1x+90x-3600=0

We add all the numbers together, and all the variables

89x-3600=0

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

89x=3600

x=3600/89

x=40+40/89

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