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10x-2-2(4x)=0.8
We move all terms to the left:
10x-2-2(4x)-(0.8)=0
We add all the numbers together, and all the variables
-14x-2.8=0
We move all terms containing x to the left, all other terms to the right
-14x=2.8
x=2.8/-14
x=-1/5
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