(3 1/4 * (-14 4/5 - 4/15) + 47) : 5 9/10 = - 1/3
1) - 14 4/5 - 4/15 = - 14 12/15 - 4/15 = - 14 16/15 = - 15 1/15
2) 3 1/4 * (-15 1/15) = 13/4 * (-226/15) = - 2938/60 = - 48 58/60 = - 48 29/30
3) - 48 29/30 + 47 = - 1 29/30
4) - 1 29/30 : 5 9/10 = - 59/30 : 59/10 = - 59/30 * 10/59 = - 10/30 = - 1/3
1) 42*100/20=210см
30,8*100/20=154кг
6*100/20=30л
2) 9*100/75=12 см
67,5*100/75=90кг
18*100/75=24л
(b*6)*9=6426
54b=6426
b=6426/54=119