Answer:

10$ for an adult and 7$ for a child

Step-by-step explanation:

price for an adult = a

price for a child = b

2a + 4b = 48………….(i)

5a + 2b = 64………….(ii)

make a subject of the formula in equation (i)

2a = 48 – 4b

divide through by 2

a = 24 – 2b

Insert the value of a in equation (ii)

5(24 – 2b) + 2b = 64

120  – 10b + 2b = 64

collect like terms

– 8b = 64 – 120

-8b = -56

divide both sides by -8

b = 7

insert the value of b in equation(i)

2a + 4(7) = 48

2a + 28 = 48

2a = 48 – 28

2a = 20

divide both sides by 2

a = 10

The price for one adult is $10 while the price for one child is $7

credit goes to vintechnology

hope that helped 🙂