The sum of the two digits of a certain number is 7. If 9 is added to the original number, the new number will have the original digits reversed. Find the number. (Hint: Let x be the tens digit and let y be the ones digit, so that the value of the number is 10x+y.)
Added by Ismael R.
Step 1
Add 9 to the number: xx+9=18 Show more…
Show all steps
Close
Your feedback will help us improve your experience
Sri K and 91 other Calculus 3 educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Seven times a two digit number is equal to four times the number obtained by reversing the order of it digits. If the sum of both digits is 9 , determine the number.
Anas V.
The tens digit of a two-digit number is one more the ones digit. If the digits are interchanged,the new number becomes 9 less than the original number. Find the number.
Donna D.
Number Problem The sum of the digits of a two-digit number is $7 .$ When the digits are reversed, the number is increased by 27 . Find the number.
Systems of Equations and Inequalities
Systems of Linear Equations in Two Variables
Recommended Textbooks
Calculus: Early Transcendentals
Thomas Calculus
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD