3 log 4 = a 3log5=b ditanya 8log20

³log20 / ³log 8
³log(5×4) / ³log4x2
³log5+³log4 / ³log4 + ³log2
b+a / a + a/2
b+ a / (2a+a) /2
b+a x 2/3a
2b+2a / 3a