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what is the value of a and b?

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what is the value of a and b?  [#permalink]

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New post Updated on: 24 Apr 2016, 03:02
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Question Stats:

74% (00:32) correct 26% (00:19) wrong based on 61 sessions

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What is the value of a and b ?
1) 2a + 6b = 8
2) 3b + a = 4

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Originally posted by sairam595 on 24 Apr 2016, 02:42.
Last edited by sairam595 on 24 Apr 2016, 03:02, edited 1 time in total.
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Re: what is the value of a and b?  [#permalink]

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New post 24 Apr 2016, 02:57
smartguy595 wrote:
What is the value of a and b ?
1) 2a + 6b = 8
2) 3b + a = 4


Hi,
you will have to recheck the answer..
we are looking value of two variables a and b, so we require two linear equations in these two variables..
both the statements give identical equation..

1) 2a + 6b = 8

2) 3b + a = 4
multiply by 2 on both sides
6b+2a=8..

so we have ONLY one equation..
ans will be Insuff even when combined
E..
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1) Absolute modulus : http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
2)Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html
3) effects of arithmetic operations : https://gmatclub.com/forum/effects-of-arithmetic-operations-on-fractions-269413.html


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Senior Manager
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Status: Always try to face your worst fear because nothing GOOD comes easy. You must be UNCOMFORTABLE to get to your COMFORT ZONE
Joined: 15 Aug 2014
Posts: 321
Concentration: Marketing, Technology
GMAT 1: 570 Q44 V25
GMAT 2: 600 Q48 V25
WE: Information Technology (Consulting)
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Re: what is the value of a and b?  [#permalink]

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New post 24 Apr 2016, 03:02
chetan2u wrote:
smartguy595 wrote:
What is the value of a and b ?
1) 2a + 6b = 8
2) 3b + a = 4


Hi,
you will have to recheck the answer..
we are looking value of two variables a and b, so we require two linear equations in these two variables..
both the statements give identical equation..

1) 2a + 6b = 8

2) 3b + a = 4
multiply by 2 on both sides
6b+2a=8..

so we have ONLY one equation..
ans will be Insuff even when combined
E..


chetan2u,

Thank you. edited OA
_________________

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I need to work on timing badly!!

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Re: what is the value of a and b?  [#permalink]

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New post 25 Jan 2018, 04:38
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Re: what is the value of a and b? &nbs [#permalink] 25 Jan 2018, 04:38
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