X-(0.2x)=40

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Solution for X-(0.2x)=40 equation:



X-(0.2X)=40
We move all terms to the left:
X-(0.2X)-(40)=0
We add all the numbers together, and all the variables
X-(+0.2X)-40=0
We get rid of parentheses
X-0.2X-40=0
We add all the numbers together, and all the variables
0.8X-40=0
We move all terms containing X to the left, all other terms to the right
0.8X=40
X=40/0.8
X=50

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