sederhanakanlah.....

a. 3/2 + 3/3a = 3*a/2*a + 3/3a = 3a/2a + 3/3a = 3a+3/5a
b. 4/3b - 3/3a = 4*a/3b*a - 3*b/3a*b = 4a/3ab - 3b/3ab = 4a-3b/3ab
c. 5/4a x 3a/6 = 15a/24a =5a/8a