Answer :
We can express this information as an equation;
The 12 Adult tickets is expressed as 12a,
The 18 student tickets is expressed as 18s,
"The difference between" simply means one expression minus the other, so the equation is;
12a - 18s = 36
The 12 Adult tickets is expressed as 12a,
The 18 student tickets is expressed as 18s,
"The difference between" simply means one expression minus the other, so the equation is;
12a - 18s = 36