Answer:
Cost of a taco is $ 1.25.
Step-by-step explanation:
Let x be tacos and y be fajitas.
Rob bought seven tacos and two fajitas for $12.65.
⇒ 7x + 2y = 12.65 – – – (1)
Adam bought four tacos and one fajitas for $6.95.
⇒ 4x + y = 6.95 – – – (2)
⇒ y = 6.95 – 4x
Substitute y = 6.95 – 4x in equation (1), we get
(1) ⇒ 7x + 2(6.95 – 4x) = 12.65
⇒ 7x + 13.9 – 8x = 12.65
⇒ –x = –1.25
⇒ x = 1.25
Hence, cost of a taco is $1.25.
