x-((x-500)*0.2)=900

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Solution for x-((x-500)*0.2)=900 equation: 



x-((x-500)*0.2)=900

We move all terms to the left:

x-((x-500)*0.2)-(900)=0



We calculate terms in parentheses: -((x-500)*0.2), so:

(x-500)*0.2

We multiply parentheses

0.2x-100

Back to the equation:

-(0.2x-100)



We get rid of parentheses

x-0.2x+100-900=0

We add all the numbers together, and all the variables

0.8x-800=0

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

0.8x=800

x=800/0.8

x=1000

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