a) 7/4+1/5x - 3/2=4/5x b) how much pure acid should be added to 18 L of 30% acid to increase the concentration of 50% acid? c) (64i)(6+4i) d) X24x=1 e) The volume of a 10-oz box of corn flakes is 180.4in . The width of the box is 3.2 3 inches less than the length, and its depth is 2.3 inches. Find the length and the width of the box to the nearest tenth. f) 4x+1 x1=2 g) 3/x2 <1