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100-x=3.2x
We move all terms to the left:
100-x-(3.2x)=0
We add all the numbers together, and all the variables
-x-(+3.2x)+100=0
We add all the numbers together, and all the variables
-1x-(+3.2x)+100=0
We get rid of parentheses
-1x-3.2x+100=0
We add all the numbers together, and all the variables
-4.2x+100=0
We move all terms containing x to the left, all other terms to the right
-4.2x=-100
x=-100/-4.2
x=23+2.42857142857/3
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