"You collect baseball and football cards. Your uncle has an old collection of 360 cards that he gives to you. The collection has more baseball cards than football cards. In fact it has 30 more than twice the number of football cards. How many of each are in your uncles collection?"
I know I can use elimination to solve this problem.. I'm having problems making the equation though.. So far I have:
I'm not sure of the other equations. Can anyone help and explain? Thank you.