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Senior | Next Rank: 100 Posts
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by madsport » Mon Sep 15, 2008 11:09 am
The answer is E

This does not make sense to me. Why is the answer E and not M=[(12p)/7]-7 ?
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by mals24 » Mon Sep 15, 2008 11:34 am
(M+6)/36 = P-7/21

(M+6)7/12=P-7

7M+42=12P-84

7M=12P-126

7M=12P-126

M=(12P/7)-18

Hence the answer is E
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by cramya » Mon Sep 15, 2008 4:13 pm
(M+6)/36 = (P-7)/21

M+6 = 36/21*(P-7)
M+6 = 12/7(P-7)
M+6 = 12/7P - 12
M= 12/7P-12-6
M = 12/7P-18
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by ddm » Mon Sep 15, 2008 9:56 pm
M+6 = 12/7P - 12
How did u get this?
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by parallel_chase » Mon Sep 15, 2008 10:48 pm
ddm wrote:M+6 = 12/7P - 12
How did u get this?
(M+6)/36 = P-7/21

M+6 = 36(P-7)/21

M+6 = 36P/21 - 36*7/21

M+6 = 12P/7 - 84/7

M+6 = 12P/7 - 12

M = 12P/7 - 12 - 6

M = 12P/7 -18

Hope this helps.
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