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20-9x=18.65
We move all terms to the left:
20-9x-(18.65)=0
We add all the numbers together, and all the variables
-9x+1.35=0
We move all terms containing x to the left, all other terms to the right
-9x=-1.35
x=-1.35/-9
x=1/6.6666666666667
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