We are given that the sum of two numbers is 24. If "x" and "y" are the two numbers then we have that:
We are also given that one number is three times the other, this is expressed as:
Now, we substitute the value of "x" from the second equation in the first equation:
Now, we add like terms:
Now, we divide both sides by 4:
Therefore, the first number is 6. Now, we substitute the value of "y" in the second equation:
Therefore, the other number is 18.