A number 4

A number is made up of two digits. The sum of the digits is 11. if the digits are interchanged, the original number increases by 9. Find the original number

Correct answer:

x =  56

Step-by-step explanation:

a+b=11 10 a+b+9=10 b+a  a+b=11 9a9b=9  Pivot:Row1Row2 9a9b=9 a+b=11  Row291 Row1Row2 9a9b=9 2b=12  b=212=6 a=99+9b=99+9 6=5  a=5 b=6  x=10 a+b=10 5+6=56



Did you find an error or inaccuracy? Feel free to write us. Thank you!







Tips for related online calculators
Do you have a system of equations and looking for calculator system of linear equations?

You need to know the following knowledge to solve this word math problem:

Related math problems and questions: