5x+84−x<2
5x+84−x<25x+84−x−2<05x+8−8+2x4−x<07x4−x<0Case 1:7x>0 and 4−x<0⇒ x>0 and 4<x⇒ 4<xCase 2:7x<0 and 4−x>0⇒x<0 and 4>x⇒x<0Hence solution set is (−∞,0)∪(4,∞)