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100-x=x+x*0.4
We move all terms to the left:
100-x-(x+x*0.4)=0
We add all the numbers together, and all the variables
-x-(+x+x*0.4)+100=0
We add all the numbers together, and all the variables
-1x-(+x+x*0.4)+100=0
We get rid of parentheses
-1x-x-x*0.4+100=0
We add all the numbers together, and all the variables
-2x-x*0.4+100=0
Wy multiply elements
-2x-0.4x+100=0
We add all the numbers together, and all the variables
-2.4x+100=0
We move all terms containing x to the left, all other terms to the right
-2.4x=-100
x=-100/-2.4
x=41+1/1.5
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