x-(x*0.2)=400

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Solution for x-(x*0.2)=400 equation: 



x-(x*0.2)=400

We move all terms to the left:

x-(x*0.2)-(400)=0

We add all the numbers together, and all the variables

x-(+x*0.2)-400=0

We get rid of parentheses

x-x*0.2-400=0

Wy multiply elements

x-0.2x-400=0

We add all the numbers together, and all the variables

0.8x-400=0

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

0.8x=400

x=400/0.8

x=500

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