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If 5a + 2b = 11 and 4a + 3b = 4, then a – b =

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BrendaMSL
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If 5a + 2b = 11 and 4a + 3b = 4, then a – b = [#permalink] If 5a + 2b = 11 and 4a + 3b = 4, then a – b =   Updated on: 06 Dec 2020, 08:38
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If 5a + 2b = 11 and 4a + 3b = 4, then a – b =

a. -7
b. 25/7
c. 48/7
d. 7
e. 15
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D

Originally posted by BrendaMSL on 24 Aug 2020, 11:30.
Last edited by Bunuel on 06 Dec 2020, 08:38, edited 2 times in total.
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Nipungupta9081
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Re: If 5a + 2b = 11 and 4a + 3b = 4, then a – b = [#permalink] If 5a + 2b = 11 and 4a + 3b = 4, then a – b =   24 Aug 2020, 11:46
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BrendaMSL
If 5a + 2b = 11 and 4a + 3b = 4, then a – b =
Kindly put the options and follow the rules. :)
Also I have solved the question but kindly put the options for better clarity.
https://gmatclub.com/forum/rules-for-po ... l#p1092822

Bunuel please check

Posted from my mobile device
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CrackverbalGMAT
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Re: If 5a + 2b = 11 and 4a + 3b = 4, then a – b = [#permalink] If 5a + 2b = 11 and 4a + 3b = 4, then a – b =   24 Aug 2020, 11:50
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The obvious approach would be to find individual values of a and b and then find a - b.

If we look a little closer, subtracting of the 2 equations is sufficient

5a + 2b - (4a + 3b) = 11 - 4

5a + 2b - 4a - 3b = 7

5a - 4a + 2b - 3b = 7

a - b = 7

Hope this Helps

Arun Kumar
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Re: If 5a + 2b = 11 and 4a + 3b = 4, then a – b = [#permalink] If 5a + 2b = 11 and 4a + 3b = 4, then a – b =   24 Aug 2020, 21:40
BrendaMSL
If 5a + 2b = 11 and 4a + 3b = 4, then a – b =

a. -7
b. 25/7
c. 48/7
d. 7
e. 15

Usual way .
You have two equations solve for a and b and then subtract the values to get answer .

bt here if you look at equations
you can find that if you subtract 2 from 1 you get a -b
5a + 2b = 11
-(4a + 3b = 4)
=> 5a - 4a +2b-3b = 7
a- b = 7
Hence D is the answer straight

faster
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Re: If 5a + 2b = 11 and 4a + 3b = 4, then a – b = [#permalink] If 5a + 2b = 11 and 4a + 3b = 4, then a – b =   01 Sep 2020, 12:54
BrendaMSL
If 5a + 2b = 11 and 4a + 3b = 4, then a – b =

a. -7
b. 25/7
c. 48/7
d. 7
e. 15

5a + 2b = 11
4a + 3b = 4
____________

a - b = 7

Answer must be (D)
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v12345
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Re: If 5a + 2b = 11 and 4a + 3b = 4, then a – b = [#permalink] If 5a + 2b = 11 and 4a + 3b = 4, then a – b =   23 Aug 2021, 10:21
5a + 2b = 11
4a + 3b = 4

Subtracting,
a – b = 7
Hence, OA is (D).
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Re: If 5a + 2b = 11 and 4a + 3b = 4, then a b = [#permalink] If 5a + 2b = 11 and 4a + 3b = 4, then a – b =   13 Mar 2023, 13:51
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Re: If 5a + 2b = 11 and 4a + 3b = 4, then a b = [#permalink]
13 Mar 2023, 13:51
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