Two of anything plus another one of the same thing always results in a total of 3 of them. It doesn't matter whether the things are cows, mushrooms, ideas, or rocks. In this question they happen to be ninths.
Answer:
The third choice, which would be:
Line 
intersects the line 
.
Step-by-step explanation:
On a graph, line 
and line 
do intersect each other, but not in the x-axis, y-axis, or at the origin.
First, open the parentheses (make sure you distribute the '-':
6x - 3x - 4 = x - 40
3x - 4 = x - 40
2x = -36
x = -18
The solution set is {-18}
