Answer:
The cost of one hamburger is $2.19.
Step-by-step explanation:
Let h = cost of a hamburger
f = cost of a french fries
3h + 4f = 10.77-------->3h + 4f = 10.77
4h + 2f = 10.86------->8h + 4f = 21.72
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5h = 10.95
h = 2.19, f = 1.05