Question

At a fast food restaurant, one hamburger and five small fries cost $8.74. If two hamburgers and

three small fries cost $7.75, what is the cost of one hamburger?

Answer 1

1 hamburger costs $1.79

Explanation:

y = total cost

h = hamburger

f = fries

h + 5f = 8.74 (Multiply this by -2)

2h + 3f = 7.75

-2h - 10f = -17.48

2h + 3f = 7.75

-7f = -9.73

f = 1.39

h + 5f = 8.74

h + 5(1.39) = 8.74

h + 6.95 = 8.74

h = 1.79