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1.5x+2.6=12.1
We move all terms to the left:
1.5x+2.6-(12.1)=0
We add all the numbers together, and all the variables
1.5x-9.5=0
We move all terms containing x to the left, all other terms to the right
1.5x=9.5
x=9.5/1.5
x=6+0.5/1.5
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