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x+1.2x=8000
We move all terms to the left:
x+1.2x-(8000)=0
We add all the numbers together, and all the variables
2.2x-8000=0
We move all terms containing x to the left, all other terms to the right
2.2x=8000
x=8000/2.2
x=3636+0.799999999999/2.2
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