Which two lines are parallel? 1) 4y=3x-4 2) 4y=-1-3x 3) 4y+3x=-1

1 and 3 are parallel because the slopes are the same

According to the standard line equation

y=mx+c

on comparing the given equations with the standard one

for 1) m=3/4

2) m=-3/4

3) m=3/4

clearly line 1 and 3 have the same slope

hence 1 and 3 are parallel

hope you understand