A sports store sold a total of 59 footballs and soccer balls last weekend. Soccer balls cost $12 and footballs costs $18. If total sales were $876, how many soccer balls did they sell?

they sold 31 soccer balls and 28 footballs.

Step-by-step explanation:

Let x represent the number of soccer balls that were sold.

Let y represent the number of football that were sold.

sports store sold a total of 59 footballs and soccer balls last weekend. This means that

x + y = 59

Soccer balls cost $12 and footballs costs $18. If total sales were $876, it means that

12x + 18y = 876 - - - - - - - - -- - -1

Substituting x = 59 - y into equation 1, it becomes

12(59 - y) + 18y = 876

708 - 12y + 18y = 876

- 12y + 18y = 876 - 708

6y = 168

y = 168/6

y = 28

x = 59 - y = 59 - 28

x = 31