LESSON 1

Find the value of two numbers if their sum is 12 and their difference is 4.

LESSON 2

The school that Stefan goes to is selling tickets to a choral performance. On the first day of ticket sales the school sold 3 senior citizen tickets and 1 child ticket for a total of $38. The school took in $52 on the second day by selling 3 senior citizen tickets and 2 child tickets. Find the price of a senoir ticket and the price of a child ticket.