x-(x*0.9)=20

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Solution for x-(x*0.9)=20 equation: 



x-(x*0.9)=20

We move all terms to the left:

x-(x*0.9)-(20)=0

We add all the numbers together, and all the variables

x-(+x*0.9)-20=0

We get rid of parentheses

x-x*0.9-20=0

Wy multiply elements

x-0.9x-20=0

We add all the numbers together, and all the variables

0.1x-20=0

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

0.1x=20

x=20/0.1

x=200

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