Three times as many children as adults attended a concert on saturday. an adult ticket cost $7 and a child’s ticket cost $3. the theatre collected a total of $6000. how many people bought tickets?

For this case we propose a system of equations:

x: Let the variable representing the number of children in the concert

y: Let the variable representing the number of adults at the concert

According to the assistance we have:

According to the cost we have:

Substituting the first in the second equation we have:

Thus, the concert was 375 adults.

On the other hand we have:

Thus, the concert was 1125 children.

In total they were:

people

The concert was 1500 people

answer is b

step-by-step explanation: