Answer:
A + 1.50r = 26.00
Step-by-step explanation:
A is the admission price, which is $15.50. So A = 15.50. Substitute 15.50 for A and subtract 15.50 from each side
A + 1.50r = 26.00
15.50 + 1.50r = 26.00
1.50r = 10.50
Divide each side by 1.50.
1.50r = 10.50
r = 7
Mark can ride 7 rides in one day.