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x+.7x=8000
We move all terms to the left:
x+.7x-(8000)=0
We add all the numbers together, and all the variables
1.7x-8000=0
We move all terms containing x to the left, all other terms to the right
1.7x=8000
x=8000/1.7
x=4705+1/1.1333333333333
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