SOLUTION: A number consists of two digits whose sum is 9. If 9 is subtracted from the number, its digits are interchanged . Find the numbers.

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Question 609526: A number consists of two digits whose sum is 9. If 9 is subtracted from the number, its digits are interchanged . Find the numbers.
Answer by flame8855(424) About Me  (Show Source):
You can put this solution on YOUR website!
x+y =9
10x+y -9 = 10y+x
9x-9=9y
x-y=1
2x=10
x=5
y =4
the number is 54