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(12)x-0.4=1.5
We move all terms to the left:
(12)x-0.4-(1.5)=0
We add all the numbers together, and all the variables
12x-1.9=0
We move all terms containing x to the left, all other terms to the right
12x=1.9
x=1.9/12
x=1/6.3157894736842
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