Jawabanmu

2014-02-12T20:53:08+07:00
3/c=12/45
12c=135
c = 135/12

16/18=2/e
16e=36
e = 36/16
2014-02-12T21:54:33+07:00
3/c =12/5
12c =45 x 3
    c=135/12
    c=12,25

16/18=2/e
16e=18 x 2
16e=36
    e=36/16 sederhanakan menjadi
    e=9/4
    e=2,25