SOLUTION: a number is decreased by 10% and then increased by 10%.the number so obtained is 10 less than the original number. what was the original number?
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Question 841543: a number is decreased by 10% and then increased by 10%.the number so obtained is 10 less than the original number. what was the original number?
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
Let x be the original number.
x-.1x=.9x
.9x+.9x*.1=.99x
.
.99x=x-10
-.01x=-10
x=10/.01
=1000
.
Ed
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