1)8*8*8=512
2)4*4*4*4=256
3)512:256=2
7х-14+10х = -8х-2
17х+8х = -2+14
25х = 12
х = 12/25
<span>решение во вложенииииииииииииииииииииииии</span>
Vобщ=V1-V2
T=S/Vобщ
Т=4,5/(15-12)=1,5ч
- 2 ≤ 2 - 3x ≤ 5
- 2 - 2 ≤ - 3x ≤ 5 - 2
- 4 ≤ - 3x ≤ 3
- 1 ≤ x ≤ 4/3
1 < (x + 4)/3 < 7 /*3
3 < x + 4 < 21 / - 4
- 1 < x < 17