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0.5=x-0.4x
We move all terms to the left:
0.5-(x-0.4x)=0
We add all the numbers together, and all the variables
-(+0.6x)+0.5=0
We get rid of parentheses
-0.6x+0.5=0
We move all terms containing x to the left, all other terms to the right
-0.6x=-0.5
x=-0.5/-0.6
x=0.5/0.6
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