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0.4x-12=3.2
We move all terms to the left:
0.4x-12-(3.2)=0
We add all the numbers together, and all the variables
0.4x-15.2=0
We move all terms containing x to the left, all other terms to the right
0.4x=15.2
x=15.2/0.4
x=37+0.4/0.4
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