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-1.1x=20.9
We move all terms to the left:
-1.1x-(20.9)=0
We add all the numbers together, and all the variables
-1.1x-20.9=0
We move all terms containing x to the left, all other terms to the right
-1.1x=20.9
x=20.9/-1.1
x=-18+1/1
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