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?

Algebra ->  Customizable Word Problem Solvers  -> Geometry -> 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?       Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

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) About Me  (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