let the price of a great big one burger is = x
let the price of a soda is = y
it is given that,
a) for the first visit
they consumed 3 "Great Big One" burgers and drank 5 large sodas paying a total of $16.50.
so, the equation is,
3x + 5y = 16.50
b) for a second visit
also, the friends paid $31.50 for 6 "Great Big One" burgers and 9 large sodas on next day
6x + 9y = 31.50
d) 3x + 5y = 16.50 ..... (1)
6x + 9y = 31.50 ......(2)
the intersection point is,
(x , y) = (3 , 1.5)
e)
the intersection point is representing the cost price of each great big One burger that is x = 3 $
and the cost price of each soda y = 1.5 $