16дм=160см=1м60см.
135см=1м35см.
1)3/4*3 - 5/6*2 = 9/12 - 10/12 = -1/2
2)-1/2 * 3 = -3/2
3)3/4*3 + 5/6*2 = 9/12 + 10/2 = 19/12
4)19/12 * 4 = 19/3
5)-3/2*3 + 19/3*2 = -9/6 + 38/6 = 29/6 = 4 5/6
... .................. .......... .
20 + 5 * 9 = 20 + 45 = 65 ( кг )
ОТВЕТ: 65 кг