Answer:
$1.20
Step-by-step explanation:
The first combination tells you ...
3d + 2h = 4.80
The second combination tells you ...
1d + 1h = 2.00
Subtracting twice the second equation from the first gives you the price of a drink:
(3d +2h) -2(1d +1h) = 4.80 -2(2.00)
d = 0.80 . . . . . . the price of a drink
The second equation tells you ...
h = 2.00 - d
h = 2.00 -0.80
h = 1.20
The cost of 1 hot dog is $1.20.
