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If a = d + 30, then d = ?

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Math Expert
Joined: 02 Sep 2009
Posts: 52905
If a = d + 30, then d = ?  [#permalink]

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17 Jan 2019, 23:31
00:00

Difficulty:

15% (low)

Question Stats:

90% (00:57) correct 10% (01:43) wrong based on 24 sessions

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If a = d + 30, then d = ?

A 75
B 80
C 85
D 90
E 95

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Joined: 30 Oct 2018
Posts: 59
Re: If a = d + 30, then d = ?  [#permalink]

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17 Jan 2019, 23:58
=> a+c=180
put value of a given
=> d+30+c=180
l parallel to m
=> d=c
=> 2d =180-30
=> 2d = 150
d= 75 (A)
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Joined: 18 Aug 2017
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Location: India
Concentration: Sustainability, Marketing
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Re: If a = d + 30, then d = ?  [#permalink]

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18 Jan 2019, 06:05
Bunuel wrote:

If a = d + 30, then d = ?

A 75
B 80
C 85
D 90
E 95

a=b=d+30
b+d=180
d= 75
IMO A
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Re: If a = d + 30, then d = ?   [#permalink] 18 Jan 2019, 06:05
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