Answer:
146 hamburgers
Explanation:
Let's call the number of hamburgers sold "H" and the number of cheeseburgers sold "C."
According to the information given in the problem:
The number of cheeseburgers sold was two times the number of hamburgers sold.
This can be expressed as:

The combined total of hamburgers and cheeseburgers sold was 438.
This can be expressed as:

Now, we have a system of two equations:


We can solve this system of equations using the substitution method.
Substitute the value of C from the first equation into the second equation:

Combine like terms:

Divide both sides by 3 to solve for H:


So, 146 hamburgers were sold on Tuesday.