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
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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) (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
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