What’s the answer? At a concession stand, seven hot dogs and four hamburgers cost $18.50; four hot dogs and seven hamburgers cost $20.00. Find the cost of one hot dog and the cost of one hamburger.

Answer 1

7d+4h = 18.50
4d+7h = 20.00
add and you have
11d+11h = 38.50
1d+1h = 3.50
now use that in either equation to find d and h sepaately