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36.4+3x+12.2=103.2
We move all terms to the left:
36.4+3x+12.2-(103.2)=0
We add all the numbers together, and all the variables
3x-54.6=0
We move all terms containing x to the left, all other terms to the right
3x=54.6
x=54.6/3
x=18+0.6/3
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