Finding x in Parallel Lines Geometry Problem

In summary, the problem asks to find x, given that L1 and L2 are parallel. Using the equation Σleft∠ = Σright∠, the attempt at a solution results in x=2°. However, the given choices for x include minutes, which may be a typo in the book. It is possible that a simple change to the coefficients or constants in the diagram could lead to the desired answer. However, there is some doubt about the validity of the problem and the book as a whole.
  • #1
david3305
6
0

Homework Statement


Find x. L1 and L2 are parallel

ex79.png

choices:
a)2°40'
b)2°30'
c)2°45'
d)2°15'
e)2°20'

Homework Equations


Σleft∠ = Σright∠

The Attempt at a Solution


2x+1+4x-1+4x-1 = 2x-1+2x+4+3x+2
10x-1=7x+5
3x=6
x=2°

Not sure how the answers include minutes '

Maybe I'm overlooking something?
 

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  • #2
I get the same result. Maybe an error in the book.
 
  • #3
Yeah, that's what I think too. I'll leave this open just in case anybody has anything to add. Maybe another way of solving?
 
  • #4
Quite possibly they made a typo when labelling the figure. You might be able to make a simple change to one of the coefficients or constants in the diagram to have it give their desired answer. :smile:
 
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  • #5
Is this for real? I've seen other problems with a similar sort of handwriting style, and wrong answers which are said to be from the mysterious "book." So what exactly is the "book?" and why do people post this sort of thing? Sorry if I am too cynical, but I could almost believe this is some kind of joke.
 
  • #6
Lol. I felt doubt about this because most of the problems i have solved had a correct answer in the choices.
 

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