Question 274474
let x="4 mph time" and y="3 mph time"


4x + 3y = 27 ___ 8x + 6y = 54


(4 + 3)x + (3 + 3)y = 51 ___ 7x + 6y = 51


subtracting equations ___ x = 3


substituting ___ 4(3) + 3y = 27 ___ y = 5