Question

Adult tickets cost $5 and student tickets cost $2.50

to a concert taking place on campus. There is a group
of 25 people comprised of adults and students
attending the concert that spent $87.50 on tickets
altogether. How many adults attended the concert?
.


Please answer it step by step :)

Answer 1

0 adults

Explanation:

→ Set up 2 equations

a + s = 25

5a + 2.50s = 87.50

→ Multiply the top equation by 5

5a + 5s = 150

5a + 2.50s = 87.50

→ Minus and solve for 2

2.50s = 62.50

→ Divide both sides by 2.50

s = 25