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# If a = d + 30, then d = ?

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Math Expert
Joined: 02 Sep 2009
Posts: 58431
If a = d + 30, then d = ?  [#permalink]

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18 Jan 2019, 00:31
00:00

Difficulty:

15% (low)

Question Stats:

91% (00:56) correct 9% (01:43) wrong based on 27 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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Manager
Joined: 30 Oct 2018
Posts: 71
Location: India
Schools: IE '22
Re: If a = d + 30, then d = ?  [#permalink]

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18 Jan 2019, 00:58
=> 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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Re: If a = d + 30, then d = ?  [#permalink]

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18 Jan 2019, 07:05
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
Re: If a = d + 30, then d = ?   [#permalink] 18 Jan 2019, 07:05
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