Answer: He payed $2.50 for one apple pie.
The second line elimates the need for curry puffs. I can just right 1/2 apple pie instead. Or, in the case of the first line, 3 curry puffs.
Let m be the original amount of money. Let a be the number of apple pies.
m/3 = 16a
m = 48a
1/6 of the money he kept.
48 * 5/6 = 40
3 of the pies were actually curry puffs.
40 - 3 = 37
92.5 / 37 = 2.50
Really is the same as the other one you posted.....
Answer: Kevin sold 63 books.
Let J be the number of books Jacob sold. Let K be the number of books Kevin sold. Let M be the number of books Miguel sold.
J + K + M = 328
M = J + 55
J = K + 42
J + K + J + 55 = 328
3K + 139 = 328
3K = 189
K = 63
If he spent 1/2 of the remainder on a calculator then he still has $18. The entire remainder would then be 36 dollars. Because he spent 1/4 of his money, the remainder is 3/4 of his original money. 4/3 x 36 = 48, so he originally had 48 dollars. Because he kept 18 dollars, he spent 30 dollars. As for a bar graph.... a bar graph of what exactly?
THIS IS AN ENGLISH QUESTION MY BRAIN IS MELTING BY LOOKING AT IT
10 years later...
Answer: Wesley bought 108 blue pens and Joshua bought 24 black pens.
Distribution of the pens after using some of them:
Wesley: Half the blue pens, half the black pens - 3
Joshua: Half the blue pens - 6, half the black pens
Let x be half the number of blue pens. Let y be half the number of black pens (they both got half):
x = 6(y - 3)
x - 6 = 4y
I'll use substitution to solve this:
6(y - 3) - 6 = 4y
6y - 18 - 6 = 4y
2y = 24
y = 12
Putting that back into one of the equations and solving it gives x = 54.
BUT I used the half number as my variables, so I'll double the numbers at this point to get (x, y) = (108, 24) or in the question terms, Wesley bought 108 blue pens and Joshua bought 24 black pens.
Answer: F***y (is that just me or does it look like that for everyone?) had 130 at first.
Let F be the amount of money F***y (I can't begin to imagine what goes there) has. Let G be the number of money Grace has.
F + G = 306
4/5 * F = G - 72
I'll solve this system using substitution.
G = 306 - F
4/5 * F = 306 - F - 72
4/5 * F = 234 - F
9/5 * F = 234
F = 130