System of equations

Question

The admission fee at a local zoo is $1.50 for children and $6.00for adults. On a certain day, 2700 people enter the zoo and $11,250.00 is collected. How many children and how many adults attended?

Answer 1

C+A = 2700

1.5C + 6A = 11250

2 equations, 2 unknowns, solve by substitution to eliminate one variable.

A = 1600 tickets for adults

C = 1100 tickets for children