x-x(.20)=20

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Solution for x-x(.20)=20 equation: 



x-x(.20)=20

We move all terms to the left:

x-x(.20)-(20)=0

We add all the numbers together, and all the variables

x-x(0.2)-20=0

We multiply parentheses

x-0.2x-20=0

We add all the numbers together, and all the variables

0.8x-20=0

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

0.8x=20

x=20/0.8

x=25

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