Jika a : b = 3 : 4, maka (6a + b) : (4a :5b) adalah

a/b = 3/4. a = 3b/4. b = 4a/3
maka ;
(6a + b) : (4a:5b) = (6a + 4a/3) : ( 4a : (5 x 4a/3))
= (18a/3 + 4a/3) : (12a/3 : 20a/3)
= 22a/3 : (36a/60a)
= 22a/3 : 3a/5a
= 110a^2 / 9a
= (110x a x a) / 9a
= 110a/9
110a = 9
a = 9/110

b = 4a/3 = (4 x 9/110)/3
= ( 36/110)/3
= 11/110
= 1/10