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12x-10x-13=15.6
We move all terms to the left:
12x-10x-13-(15.6)=0
We add all the numbers together, and all the variables
2x-28.6=0
We move all terms containing x to the left, all other terms to the right
2x=28.6
x=28.6/2
x=14+0.6/2
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