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12x+3(18.20)=81.6
We move all terms to the left:
12x+3(18.20)-(81.6)=0
We add all the numbers together, and all the variables
12x+3(18.2)-(81.6)=0
We add all the numbers together, and all the variables
12x-27=0
We move all terms containing x to the left, all other terms to the right
12x=27
x=27/12
x=2+1/4
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