Çözüldü Line Equations - Slope of A Linear Function

Based on a system of linear equations 2y - 4 - x = 0 and 2x + 4y - 8 = 0 which of the following describes the graph of this system of linear equations in the standard (x, y) coordinate plane?

A) A single line with positive slope
B) A single line with negative slope
C) Two distinct intersecting lines
D) Two parallel lines with positive slope
E) Two parallel lines with negative slope

Solution: Since the slopes (1 / 2 and -2 / 4) of the lines are neither parallel, nor to one another, these lines intersect at a point.

Official Solution:

https://i72.servimg.com/u/f72/19/97/10/39/act10.png
https://drive.google.com/file/d/0B-SjC2QWxqXRbkJDUG9tM0ttOHM/view
[Page 2, Question 8 (with slightly easier equations), Solution on Pages 5 - 6]