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6x+12.5x-2=7
We move all terms to the left:
6x+12.5x-2-(7)=0
We add all the numbers together, and all the variables
18.5x-9=0
We move all terms containing x to the left, all other terms to the right
18.5x=9
x=9/18.5
x=1/2.0555555555556
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