You are the captain of the volleyball team and are in charge of ordering t shirts and sweatshirts. T shirts cost $8 and sweatshirts cost $22. If the total cost of the 60 shirts is $872, how many of each did you purchase?
Good communication (explaining what you are doing) is quite important. It could get you extra marks
2 unknowns means you need 2 equations.
Let the count of sweatshirts be
Let the count of T Shirts be
Then we have
The trick is use these so that you only have 1 unknown in 1 equation.
Multiply out the brackets
Subtract 480 from both sides
Divide both sides by 14
Subtract 28 from both sides