Asked by divine
in a positive number of two digits,the sum of the digits is 15.if the digits are interchanged the number is increased by 9.find the number.
Answers
Answered by
Reiny
let the unit digit be x
then the tens digit is 15 - x , (their sum is 15)
original number = 10(15-x) + x
= 150 - 9x
the number reversed = 10x + 15-x
= 9x + 15
What does our question tell us about the relationship between these two expressions?
form your equation and solve for x
sub back into my definitions
then the tens digit is 15 - x , (their sum is 15)
original number = 10(15-x) + x
= 150 - 9x
the number reversed = 10x + 15-x
= 9x + 15
What does our question tell us about the relationship between these two expressions?
form your equation and solve for x
sub back into my definitions
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