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x+7.2+2x-1.5+2x-1.5+x+x=28.5
We move all terms to the left:
x+7.2+2x-1.5+2x-1.5+x+x-(28.5)=0
We add all the numbers together, and all the variables
7x-24.3=0
We move all terms containing x to the left, all other terms to the right
7x=24.3
x=24.3/7
x=3+2.53846153846/5.38461538462
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