SOLUTION: The sum of the digits of a two digit number is 10. The number formed by reversing the number is 4 less than 5 times the number. Find the original number? Can you please help me

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Question 691411: The sum of the digits of a two digit number is 10. The number formed by reversing the number is 4 less than 5 times the number. Find the original number?
Can you please help me out with this question I really don't understand? thanks in advance:)
Answer by Edwin McCravy(20065) About Me  (Show Source):
You can put this solution on YOUR website!
t = tens digit
u = units or ones digit
the number = 10t+u
the number reversed = 10u+t

system%2810t%2Bu+=+10%2C%0D%0A10u%2Bt+=+5%2810t%2Bu%29+-+4%29

Solve that and get t=1, u=9, answer: 19 

Edwin