Post your question in the Comment section below, and a GMAT expert will answer it as fast as humanly possible.
- Video Course
- Video Course Overview
- General GMAT Strategies - 7 videos (free)
- Data Sufficiency - 16 videos (free)
- Arithmetic - 38 videos
- Powers and Roots - 36 videos
- Algebra and Equation Solving - 73 videos
- Word Problems - 48 videos
- Geometry - 42 videos
- Integer Properties - 38 videos
- Statistics - 20 videos
- Counting - 27 videos
- Probability - 23 videos
- Analytical Writing Assessment - 5 videos (free)
- Reading Comprehension - 10 videos (free)
- Critical Reasoning - 38 videos
- Sentence Correction - 70 videos
- Integrated Reasoning - 17 videos
- Study Guide
- Blog
- Philosophy
- Office Hours
- Extras
- Prices
Comment on Equation with Powers of 11
At around 00:30 in the video,
Perfect! That works too.
Perfect! That works too.
Do you have a few more
Here are a few more:
Here are a few more:
- https://gmatclub.com/forum/if-0-0015-10-m-0-03-10-k-5-10-7-then-m-k-1450...
- https://gmatclub.com/forum/8-a-1-4-b-188024.html
- https://gmatclub.com/forum/if-5-13-9-7-3-15-x-what-is-the-value-of-x-219...
- https://gmatclub.com/forum/if-x-and-k-are-integers-and-12-x-4-2x-1-2-k-3...
Cheers,
Brent
Hi,
There is something that seems very simple that I don't understand. I found -7/4 as a result because I did 12-8+4k = 4+4k. How do you find 4-4k?
Thanks,
We want to simplify 12 - (8 +
We want to simplify 12 - (8 + 4k)
Here we're subtracting (8 + 4k) from 12, which means we must subtract 8 from 12 AND subtract 4k from 12.
So, 12 - (8 + 4k) = 12 - 8 - 4k = 4 - 4k
Here's another example;
Simplify 2x - (5 - 4x)
In this case, we're subtracting (5 - 4x) from 2x, which means we must subtract 5 from 2x AND subtract -4x from 2x
So, 2x - (5 - 4x) = 2x - 5 - (-4x) = 2x - 5 + 4x = 6x - 5
For more on this, check out my example at 4:42 in the following video: https://www.gmatprepnow.com/module/gmat-algebra-and-equation-solving/vid...
I see the difference! Thank
plug in value here is a
Plugging in values will take
Plugging in values will take some time, but that strategy will definitely work!
why -4k=-7 result in 4/7 but
4/7 and -4/-7 are equivalent
4/7 and -4/-7 are equivalent fractions.
Similarly, (-10) ÷ (-2) = 5 and 10 ÷ 2 = 5
Here, we're applying the rule that says (negative) ÷ (negative) = positive
So it is implied that -7/-4
Yes, the fraction -7/-4 is
Yes, the fraction -7/-4 is positive.
We can use equivalent fractions to show why: -7/-4 = (-1)(7)/(-1)(4) = (-1/-1)(7/4) = (1)(7/4) = 7/4