Another problem that I guessed right.

  • Context: Undergrad 
  • Thread starter Thread starter AznBoi
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Discussion Overview

The discussion revolves around a mathematical problem involving absolute values and the potential values of a linear expression derived from two equations. Participants explore methods for solving the problem and discuss the implications of their findings.

Discussion Character

  • Homework-related
  • Mathematical reasoning
  • Exploratory

Main Points Raised

  • One participant presents a problem involving absolute values and asks for help in determining possible values for a derived expression.
  • Another participant suggests that the correct answer is one of the options and reasons that it is due to divisibility properties of the numbers involved.
  • A different participant proposes solving for x in both equations, noting that each expression yields two solutions, leading to multiple combinations for x + y.
  • One participant encourages the original poster to consolidate their questions into a single thread for clarity.
  • A later reply indicates that the original poster has solved the problem, although details of the solution are not provided.

Areas of Agreement / Disagreement

Participants express differing views on the correct answer to the problem and the methods for solving it. There is no consensus on a single approach or solution.

Contextual Notes

The discussion does not clarify the assumptions underlying the absolute value equations or the specific methods for solving them. The potential solutions and their relationships to the original equations remain unresolved.

Who May Find This Useful

Readers interested in mathematical problem-solving, particularly involving absolute values and linear equations, may find this discussion relevant.

AznBoi
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-_- I'm getting annoyed and I suppose that you guys are too of problems that I don't know exactly how it works! I've made educated guesses and apparently have guessed this one right.

Here goes:
If 2lx+3l=4 and ly+1l/3=2, then lx+yl could equal each of the following EXCEPT:

a) 0
b) 4
c) 8
d) 10
e) 12
 
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Oops, the correct answer is D and I think this is because the other numbers are divisble by 4 and 2 except 10?? lol Can anyone tell me a way of solving this numerically? Plug in numbers? solve for x and y? Please also state the way you think is most efficient. Thanks!
 
Solve for x in both expressions. Since you have an absolute, there is 2 solutions to each expression. There is a total of 4 combinations for x + y, find all of them and deduce which answer is wrong. And by the way, why don't you make a thread where you can post all your questions? No need to make 3 threads. :-p
 
Last edited:
haha ok, yeah I solved it thanks!
 

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