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.04(x)+x=40000
We move all terms to the left:
.04(x)+x-(40000)=0
We add all the numbers together, and all the variables
1.04x-40000=0
We move all terms containing x to the left, all other terms to the right
1.04x=40000
x=40000/1.04
x=38461+0.559999999998/1.04
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