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0.8x-0.4=1.2
We move all terms to the left:
0.8x-0.4-(1.2)=0
We add all the numbers together, and all the variables
0.8x-1.6=0
We move all terms containing x to the left, all other terms to the right
0.8x=1.6
x=1.6/0.8
x=2
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