Could someone help me really confused on how to work them out

Step-by-step explanation:

We are going to solve the system by subtracting one equation from another in this case the second from the first.

Now we are going to divide 30 by 6 which will give you the value of x.

Now we will substitute x into one of the equations to solve for y.

Now we multiplied 6 by 5.

Now we will subtract 30 from 60 giving you the value of 2y.

Now you divide 30 by 2 giving you the value of y.

Now check you answers by inserting the values you got for x and y into one of the original    .    

 Each solo act will last 5 minutes and each ensemble act will last 15 minutes.

the two may have that, even a breakdown is probably offered