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4.28+-0.4x=1.08
We move all terms to the left:
4.28+-0.4x-(1.08)=0
We add all the numbers together, and all the variables
-0.4x+3.2=0
We move all terms containing x to the left, all other terms to the right
-0.4x=-3.2
x=-3.2/-0.4
x=+8
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