Thread: Not sure how to solve this problem?

"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:

X+y=360

I'm not sure of the other equations. Can anyone help and explain? Thank you.

Originally Posted by WannaBSmart

"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:

X+y=360

I'm not sure of the other equations. Can anyone help and explain? Thank you.

b = number of baseball cards

f = number of football cards

b + f = 360

b = 30 + 2f

Originally Posted by wannabsmart

"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:

X+y=360

i'm not sure of the other equations. Can anyone help and explain? Thank you.

360 = 30 + 2n

360 - 30 = 2n

330 / 2 = n

n = 165

Originally Posted by David Green

360 = 30 + 2n

360 - 30 = 2n

330 / 2 = n

n = 165

... and this try at a solution would be incorrect.