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20-0.8x-8=22
We move all terms to the left:
20-0.8x-8-(22)=0
We add all the numbers together, and all the variables
-0.8x-10=0
We move all terms containing x to the left, all other terms to the right
-0.8x=10
x=10/-0.8
x=-12+0.4/0.8
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