X is the undefined variable hope it helps
Answer:
Original number is 47
Step-by-step explanation:
Given: The tens digit is three less than the units digit. If the digits are reversed, the sum of the reversed number and the original number is 121.
To find: the original number
Solution:
Let x denotes digit at ones place.
As the tens digit is three less than the units digit,
Digit at tens place = 
Original number = 
When digits are reversed,
Reversed number = 
As the sum of the reversed number and the original number is 121,

So,
original number = 
so x^2 + 3x + 2 = 2x+3
or x^2 + x = 1
After that just use the a quadratic equation formula
Answer:


⎆ The answer will be <u>-29/11</u>. This answer cannot be further simplified.
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