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13x+15.6=102.7
We move all terms to the left:
13x+15.6-(102.7)=0
We add all the numbers together, and all the variables
13x-87.1=0
We move all terms containing x to the left, all other terms to the right
13x=87.1
x=87.1/13
x=6+8.2727272727273/11.818181818182
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