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19.8x-1.64=20x
We move all terms to the left:
19.8x-1.64-(20x)=0
We add all the numbers together, and all the variables
-0.2x-1.64=0
We move all terms containing x to the left, all other terms to the right
-0.2x=1.64
x=1.64/-0.2
x=-8+0.04/0.2
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