1) 80 ÷ × = 8
х = 80÷8
х = 10
2) 32 ÷ х = 4
х = 32÷ 4
х = 8
3) х ÷ 8 = 8
х = 8×8
х = 64
4) х × 3 = 21
х = 21 ÷ 3
х =
5) х + 29 = 80
х = 80 - 29
х = 51
6) х - 2 = 40
х = 40 + 2
х = 42
M-1/5=-8/15
M=-8/15+1/5
M=-1/3
<span>70000xZ<210000</span>
Z<30
1)33+15=48-бояр,,,,2)33-19=14-крест....3)33+48+14=95