Alexis bought 3 drinks and 4 hamburgers for her family that cost $18.25. Landon bought 4 drinks and 6 hamburgers at the same fast food restaurant for $26.50. What was the total cost of one hamburger and one drinks?

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Edit:
Hamburger costs $3.25
Drink costs $1.75

Alexis = 4 Hamburgers and 3 Drinks
4 x 3.25 = 13.00
3 x 1.75 = 5.25 
+ = 18.25

Landon = 6 Hamburgers and 4 Drinks
6 x 3.25 = 19.50
4 x = 7
+ = 26.50