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x+.8x=28.08
We move all terms to the left:
x+.8x-(28.08)=0
We add all the numbers together, and all the variables
1.8x-28.08=0
We move all terms containing x to the left, all other terms to the right
1.8x=28.08
x=28.08/1.8
x=15+1/1.6666666666667
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