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4.28-0.4x=2.28
We move all terms to the left:
4.28-0.4x-(2.28)=0
We add all the numbers together, and all the variables
-0.4x+2=0
We move all terms containing x to the left, all other terms to the right
-0.4x=-2
x=-2/-0.4
x=+5
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