<em>Масса кошки, которой год- 3.</em>
2,8/16,8 = 14/5 x 5/84=1/6
7,5/58,5 = 15/2 x 2/117 = 5x 1/39 = 5/39
1. 5/9 - 7/18 = 10/18 - 7/18 = 3/18 = 1/6.
2. 4/5 - 5/8 = 32/40 - 25/40 = 7/40.
3. 11/16 - 5/12 = 132/192 - 80/192 = 52/192 = 26/96 = 13/48.
16x-4=18x-5=1/2=0/5 вроде так