Answer:
The number of hamburgers sold was 139 and the number of cheeseburgers sold was 278.
Step-by-step explanation:
Let
x -----> the numbers of hamburgers sold on Thursday
y -----> the numbers of cheeseburgers sold on Thursday
we know that
[tex]x+y=417[/tex] ----> equation A
[tex]y=2x[/tex] ----> equation B
Substitute the equation B in equation A and solve for x
[tex]x+2x=417[/tex]
[tex]3x=417[/tex]
[tex]x=139[/tex]
Find the value of y
[tex]y=2(139)=278[/tex]
therefore
The number of hamburgers sold was 139 and the number of cheeseburgers sold was 278.