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At a certain diner, a hamburger (H) and coleslaw (C) cost

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At a certain diner, a hamburger (H) and coleslaw (C) cost [#permalink] New post 24 Aug 2003, 05:19
At a certain diner, a hamburger (H) and coleslaw (C) cost $3.59, and a hamburger and french fries (F) cost $4.40. If french fries cost twice as much as coleslaw, how much do french fries cost?
(A) $0.30
(B) $0.45
(C) $0.60
(D) $0.75
(E) $0.90

here is my way.

H+C=3.59
H+F=4.40
F=2C

then i have two equation:
H+C=3.59
H+2C=4.40

which is solved like:
H=3.59-C
3.59-C+2C=4.40
C=0.81

but multiplying 0.81 by 2 gives us 1.62, which is not stated among choices. this time, am i wrong or our chinese friends from down3.net are? :?
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 [#permalink] New post 24 Aug 2003, 07:37
id say you are right
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 [#permalink] New post 25 Aug 2003, 08:43
You are exactly right. F = 1.62
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Sept 3rd

  [#permalink] 25 Aug 2003, 08:43
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At a certain diner, a hamburger (H) and coleslaw (C) cost

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