SOLUTION: Bob had enough money to buy 25 chocolate cookies. Each chocolate cookie cost as much as 2 butter cookies. He borrowed another 6 dollars to buy 20 chocolate and 20 butter cookies.

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Question 1168001: Bob had enough money to buy 25 chocolate cookies. Each chocolate cookie cost as much as 2 butter cookies. He borrowed another 6 dollars to buy 20 chocolate and 20 butter cookies.
How much money did he have at first?

Answer by VFBundy(438) About Me  (Show Source):
You can put this solution on YOUR website!
Cost of one chocolate cookie = x
Cost of one butter cookie = 0.5x

25x + 6 = 20x + 20(0.5x)

25x + 6 = 20x + 10x

25x + 6 = 30x

5x = 6

x = $1.20

Since Bob originally had enough money to buy 25 chocolate cookies...and we know one chocolate cookie costs x dollars ($1.20)...that means 25 chocolate cookies cost $30. So, Bob originally had $30.