Question

Colton sold a total of 28 tee shirts and sweatshirts as a fundraiser for his football team. If tee shirts cost 12 dollars each and sweatshirts cost 20 dollars each and he raised a total of 424 dollars how many tee shirts did he sell?

Answer 1

11 sweatshirts and 17 t shirts

Explanation:

`t + s = 28\\12t = 20s = 424`

Step one: cancel out one variable. In this one, t.

`-12(t + s = 28)\\-12t -12s =-336`

Now that we have that, subtract that from the other expression.

`12t + 20s = 424\\-12t -12s = 336`

You should get:

`8s = 88\\ s = 11`

Plug s in any expression

`t + 11 = 28`

You should know where to go from there, I'm lazy :p

Then t = 17

GOod Luck!!!!