GRE Prep Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
If 5a – 3b = –9 and 3a + b = 31, then a + b = d –7 d –3
[#permalink]
21 Jun 2017, 12:36
21 Jun 2017, 12:36
Expert Reply
00:00
Question Stats:
78% (01:52) correct
21% (01:40) wrong based on 88 sessions
Hide Show timer Statistics
If 5a – 3b = –9 and 3a + b = 31, then a + b =
A) –7
B) –3
C) 6
D) 13
E) 19
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
If 5a – 3b = –9 and 3a + b = 31, then a + b = d –7 d –3
[#permalink]
30 Jul 2017, 17:44
30 Jul 2017, 17:44
2
Carcass wrote:
If 5a – 3b = –9 and 3a + b = 31, then a + b =
A) –7
B) –3
C) 6
D) 13
E) 19
Given:
5a – 3b = –9
3a + b = 31
Multiply bottom equation by 3 to get:
5a – 3b = –9
9a + 3b = 93
ADD the equations to get:
14a = 84
Solve: a = 6
Plug a = 6 into the equation 3a + b = 31 to get 3(6) + b = 31
Simplify: 18 + b = 31
Solve: b = 13
So, a + b = 6 + 13 = 19
Answer: E
Re: If 5a 3b = 9 and 3a + b = 31, then a + b = d 7 d 3
[#permalink]
10 Feb 2024, 14:03
10 Feb 2024, 14:03
Hello from the GRE Prep Club BumpBot!
Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
