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x*1.1*0.8=x-4920
We move all terms to the left:
x*1.1*0.8-(x-4920)=0
Wy multiply elements
0.88x-(x-4920)=0
We get rid of parentheses
0.88x-x+4920=0
We add all the numbers together, and all the variables
-0.12x+4920=0
We move all terms containing x to the left, all other terms to the right
-0.12x=-4920
x=-4920/-0.12
x=+41000
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