A two-digit number is equal to three added to four times the total sum numbers. Add 18  to the numbers to swap the numbers. Find the number:

# A two-digit number is equal to three added to four times the total sum numbers. Add 18  to the numbers to swap the numbers. Find the number:

1. A
2. B
3. C
4. D

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### Solution:

Concept-
The unit of the original number is x, and the tens place of the original number is y. Therefore, the original number is Therefore, we use the statement that the two-digit number 3 is at least four times the sum of the digits to form the first equation. Swapping the numbers adds which is equal to 18, to the original number, resulting in the second expression. Solve the equation to get the answer.
Let the tens and unit digit of number are First condition:
Second condition :
Subtract resultant equations;
Two digit number Hence, option 1 is correct.

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