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12x=5.4
We move all terms to the left:
12x-(5.4)=0
We add all the numbers together, and all the variables
12x-5.4=0
We move all terms containing x to the left, all other terms to the right
12x=5.4
x=5.4/12
x=3.8571428571429/8.5714285714286
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