Question

Jake buys 2 burgers and 2 orders of fries for $5, Sean buys 3 burgers and 4 order of fries for $8.50, how much does each burger cost?​

Answer 1

Answer: 2b +2f =5----------(1)

3b +4f =8.5---------(2)

From eqn 1

2f = 5 -2b

f = (2.5 - b)

Put f =(2.5-b) in eqn 1

3b + 4(2.5-b) =8.5

3b +9 - 4b =8.5

-b = -0.5

b = $0.5

Explanation: