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If (l − m)/(7 − 2) = l/7 − m/2, which of the following statements must

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Math Expert
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If (l − m)/(7 − 2) = l/7 − m/2, which of the following statements must  [#permalink]

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New post 23 Nov 2016, 06:37
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A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

74% (01:46) correct 26% (01:53) wrong based on 96 sessions

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Re: If (l − m)/(7 − 2) = l/7 − m/2, which of the following statements must  [#permalink]

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New post 24 Nov 2016, 06:10
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Bunuel wrote:
If (l − m)/(7 − 2) = l/7 − m/2, which of the following statements must be true?

A. l = m
B. l = −m
C. 2l = −7m
D. 3l = −19m
E. 4l = −21m


\(\frac{(l − m)}{(7 − 2)} = \frac{l}{7} − \frac{m}{2}\)

\(\frac{(l - m)}{5} = \frac{l}{5} - \frac{m}{5} = \frac{l}{7} - \frac{m}{2}\)

\(\frac{l}{5} - \frac{l}{7} = \frac{m}{5} - \frac{m}{2}\)

\(l*(\frac{2}{35}) = m*(\frac{-3}{10})\)

\(4l = -21m\)

Answer (E)
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Re: If (l − m)/(7 − 2) = l/7 − m/2, which of the following statements must   [#permalink] 24 Nov 2016, 06:10
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