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2.2x=x+100
We move all terms to the left:
2.2x-(x+100)=0
We get rid of parentheses
2.2x-x-100=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+0.4/1.2
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