Another Math problem

x = amount of marbles
p = price of a marble
xp = 36
(x-3)/3*p = 9
xp-3p = 27
-xp = -36
-3p = -9
p=3
3x=36
x = 12
Assuming that he sold at the same price per marble that he bought for, he bought 12 marbles for 36 cents and sold 3 for 9 cents. I'd consider this a fairly easy question; it's just solving a system of equations. Though without some additional assumption it's impossible. I could buy 12000 marbles for 36 cents lose three and sell 3999 for 9 cents, but I'd be doing it at a loss.

huh?

I must have done something wrong.

x - 3 = 36

x = 36 + 3

x = 39

he lost three of them and sold 1/3 of the reminder

1/3*(x - 3)

1/3*(39 - 3)

1/3*36

12

I clearly do not know what I'm doing here.

Quote:

Original post by Marques x - 3 = 36

Where do you get this from?

Quote:

Original post by bakery2k1 Quote: Original post by Marques x - 3 = 36 Where do you get this from?

I clearly do not know what I'm doing.

Alrecenk,
I took your answer to my wife and she explain it too me. She says thanks btw.

She understand how you got the answer, but she is having a hard time getting the answer her self.

I use to think I knew what I was doing, now I'm not so sure.

You're mistaking the 36 cents as the number of marbles he starts with before he loses the 3.

Folks,

Read the Forum FAQ. Blatant homework/schoolwork problems are inappropriate in this game-development-related forum. Thread closed.