Given :
Parallel lines are
x – 2y = 3 and 2x – 4y = 12
Step-by-step explanation:
Lets write the given lines in slope intercept form y=mx+b

From the above equation , y intercept of first line is 
Solve the second equation for y and find out y intercept

y intercept of second line is -3
To find the distance between parallel lines, we subtract the y intercepts

Answer:
The distance between the parallel lines = 1.5
Reference:
brainly.com/question/24145911