Question

Alex, his two sisters, and his dad are going to a movie. Alex

and his sisters can get student tickets. Adult tickets are three
dollars more than student tickets. Which algebraic expression
represents how much Alex and his family will spend to go to
the movies?

Answer 1

y is going to rep students

x adults

if y=$12 and x=y+$3

you have to take $12 and add $3

so Alex's dad ticket will be $15

Answer 2

Let x represent student tickets
Let y represent adult tickets

y = 3.00 + x ..... (1)

Total cost
= 3x + y (3 student tickets and 1 adult ticket)
= 3x + 3+ x (sub equation (1))
= 4x + 3