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-2.8+0.4x=4.4
We move all terms to the left:
-2.8+0.4x-(4.4)=0
We add all the numbers together, and all the variables
0.4x-7.2=0
We move all terms containing x to the left, all other terms to the right
0.4x=7.2
x=7.2/0.4
x=18
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