Question 463640
9x - 8 = y
8x - 4 = y

minus eq1 from eq2
x -4 = o
x = 4

substitute in eq1
(9)(4) - 8 = y
36 - 8 = y
28 = y
check your answer
8x - y = 4   from eq2
8*4 - 28 =?
32 - 28 = 4

write the two equations in standard from y = mx + b
y = 9x -8 slope =9
y = 8x - 4 slope = 8 
since they are not equal they are not parrell