Positive integers a and b are such that the graphs of y=a x+5 and y=3 x+b intersect the x-axis at the same point. What is the sum of all possible x coordinates of these points of intersection?
Answer Choices
A. -20
B. -18
C. -15
D. -12
E. -8
Positive integers a and b are such that the graphs of y=a x+5 and y=3 x+b intersect the x-axis at the same point. What is the sum of all possible x coordinates of these points of intersection?
Answer Choices
A. -20
B. -18
C. -15
D. -12
E. -8