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4+2+2x=3.8
We move all terms to the left:
4+2+2x-(3.8)=0
We add all the numbers together, and all the variables
2x+2.2=0
We move all terms containing x to the left, all other terms to the right
2x=-2.2
x=-2.2/2
x=-1+0.2/2
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