1)42-8=34(кг)
2)36:2=17(кг)-в первом ящике
3)17+8=25(кг)- во втором ящике
<span>24,24:12 =2,02 42,42:7 =6,06 42,42:14=3,03 565,6:8=70,7 484,8:6=80,8 636,3:7=90,9
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<span>9 1/5-(5x-4 1/2):11 1/4=8 14/15
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<span>(5x-4 1/2):11 1/4= 5Х:45/4 - 9/2:45/4 = 4/15X - 2/5
46/5 -</span><span><span>4/15X + 2/5</span> = 134/15
-4/15X = 134/15-46/5-2/5
-4/15X = 134/15 - 48/5
-4/15X = 134/15-144/15
-4/15X=-10/15
X = 10/15:4/15
X=2 1/2
5/12 y+3 2/3+7/8 y= 5 1/18</span>
5/12y+7/8y=91/18 - 11/3
30/72y+56/72y = 364/72 - 264/72
86/72y = 100/72
y = 100/72:86/72=100:86= 1 14/86=1 7/43
С=Пд=3,1*8=24,8см вот и всё!!!!!!!!!!!!