P=2*3+2*10=26 cм
S=3*10=30 cм2
1-ая тройка: 7,26,182
7 * х = 182 182 : х = 7 182 : х = 26 26*х = 182
7х = 182 х = 182 : 7 х = 182 : 26 26х = 182
х = 26 х = 26 х = 7 х = 7
--------------------------------------------------------------------------------
2-ая тройка: 149, 343, 492
х + 149 = 492 х + 343 = 492 492-х =343 х = 149+343
х = 492 - 149 х = 492 - 343 х =492-343 х = 492
х = 343 х = 149 х = 149
--------------------------------------------------------------------------------
3-ья тройка: 64,8,512
64*х = 512 512 : х = 8 8х = 512 х : 64 = 8
64х = 512 х= 512 : 8 х = 64 х = 8 *64
х = 8 х= 64 х = 512
<span>d:14+706=1002
d:14=1002-706
d:14=296
d=296*14
d=4144
4144:14+706=1002
296+706=1002
1002=1002
</span>