Всего 15 метров 7 + 8 = 15
О________________М
А_______К
<span>1)
-2 < 3х+1< 7
</span><span>-3< 3х< 6
</span>-1<х <2 <span>
2)
2 < 5х-3< 17
5</span><span><5х < 20
</span><span>1< х< 4
</span><span>
3)
3< 7-4х< 15
</span><span>-4<-4х < 8
</span><span>-2<х < 1
</span><span>
4)
-12< 2(х+3) < 4
</span><span>-6<х+3 < 2
</span><span>-9<х < -1</span>
600 д. = 100%
х д. = 117%
х = (600*117)/100
х = 702 дерева
<span>верные равенства
18+2 = 34-14
</span>18+2 = <span>70-50
</span>34-14 =70-50
<span>не верные равенства
18+2 =34-14
56-50 =34-14
70-50=34-144</span>