Question 476962
A number is increased by 50 percent, and then the resulting number is decreased by 40 percent. What was the original number if the final number is eight less than the original?
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let x=number
(x+.5x)-.4(x+.5)=x-8
1.5x-.4*1.5x=x-8
1.5x-.6x=x-8
.9x=x-8
.1x=8
x=80
ans:
original number=80