SOLUTION: the sum of 3 digist is 5. The first and last digits are the same. If the middle digit is exchange with the first digit , then the number is 90 less than the original number. Find t

Algebra ->  Customizable Word Problem Solvers  -> Numbers -> SOLUTION: the sum of 3 digist is 5. The first and last digits are the same. If the middle digit is exchange with the first digit , then the number is 90 less than the original number. Find t      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 107037This question is from textbook algebra 1
: the sum of 3 digist is 5. The first and last digits are the same. If the middle digit is exchange with the first digit , then the number is 90 less than the original number. Find the original number. This question is from textbook algebra 1

Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
let x="first and last", so 5-2x=middle

100(5-2x)+10x+x+90=100x+10(5-2x)+x ... 500-200x+11x+90=100x+50-20x+x ... 590-189x=81x+50

540=270x