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 y = 4x + 10 and y = 7x – 5, what is the value of y?
[#permalink]
20 Jul 2018, 11:45
20 Jul 2018, 11:45
Expert Reply
00:00
Question Stats:
89% (00:30) correct
10% (00:53) wrong based on 47 sessions
Hide Show timer Statistics
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
Re: If y = 4x + 10 and y = 7x – 5, what is the value of y?
[#permalink]
08 Aug 2018, 14:44
08 Aug 2018, 14:44
1
Carcass wrote:
Since both equations are set equal to y, we can write: 4x + 10 = 7x - 5
Subtract 4x from both sides: 10 = 3x - 5
Add 5 to both sides: 15 = 3x
Solve: x = 5
Now that we know the value of x, we can take either equation (y = 4x + 10 or y = 7x - 5) and replace x with 5 to determine the value of y
So, take y = 4x + 10
Replace x with 5 to get: y = 4(5) + 10 = 20 + 10 = 30
Answer: y = 30
Cheers,
Brent
Re: If y = 4x + 10 and y = 7x – 5, what is the value of y?
[#permalink]
10 Aug 2018, 15:45
10 Aug 2018, 15:45
1
As Y = 4X + 10 = 7X - 5
we find 15 = 3X
Or, X = 5.
so from the eqn we find Y = 30.
we find 15 = 3X
Or, X = 5.
so from the eqn we find Y = 30.
