Answer:
27 ham sandwiches
Explanation:
Let
x ----> the number of turkey sandwiches
y ----> the number of ham sandwiches
we know that
x=y -----> equation A
y=3(x-18) -----> equation B
substitute equation A in equation B
x=3(x-18)
x=3x-54
3x-x=54
2x=54
x=27 turkey sandwiches (initial)
therefore
The number of ham sandwiches is equal to
y=27 ham sandwiches
Note The options of this problem are incorrect, the number of sandwiches of ham must be greater than 18