X/9 - 7/9 = 3 7/9
х/9 = 34/9 + 7/9
х/9 = 41/9
х = 41/9 * 9
х = 41
41/9 - 7/9 = 3 7/9
34/9 = 3 7/9
3 7/9 = 3 7/9
5 4/15 - x/15 = 4 7/15
79/15 - х/15 = 67/15
х/15 = 79/15 - 67/15
х/15 = 12/15
х = 12/15 * 15
х = 12
79/15 - 12/15 = 67/15
67/15 = 67/15
4 7/15 = 4 7/15
<span>3 18/19+ x/19= 15/19
</span>75/19 + х/19 = 15/19
х/19 = 15/19 - 75/19
х/19 = - 60/19
х = - 60/19 * 19
х = - 60
75/19 + (- 60/19) = 15/19
75/19 - 60/19 = 15/19
15/19 = 15/19
Sсект.=πR²/360° * α=3²π/360° * 135°=27π/8
S/π=27π/8/π=27/8
а>b
a>b
4500кг=4,5т
1т=100% => 4,5т=4,5*100=450%
2т300кг=2300кг=2,3 т
1т=100% => 2,3т=100%*2,3=230%
9\12 - 37\100= 900- 444 \1200=456\1200 или =2целых 6 10-тых