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100-0.2x=x
We move all terms to the left:
100-0.2x-(x)=0
We add all the numbers together, and all the variables
-1.2x+100=0
We move all terms containing x to the left, all other terms to the right
-1.2x=-100
x=-100/-1.2
x=83+0.40000000000001/1.2
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