Первая группа посадила 3/8 части всех деревьев , а вторая группа 5/6 части оставшихся деревьев.сколько деревьев должны были посадить две группы , если вторая посадила 75 деревьев

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1)1.7-14=-7                                                                                                                                                         2.-28:-7=4                                                                                                                                                            3.4-10=-6                                                                                                                                                            задача а: 36*2/9=8 лет                                                                                                                                    задача б: 5:4*100=125%                                                                                                                                задача в 40%=20 слов                           40%=0,4                                                                                         20:0,4=50 слов                                                                                                                                                  10(1-0,2у)-(1-у)=17                                                                                                                                            10-2у-1+у=17                                                                                                                                                      9-у=17                                                                                                                                                                   у=9-17=-8                                                                                                                                                            щас остальные ответы напишу                                                                                                               задача:60 + 8=68км/час - второй поезд                                                                                               24*1/3=8 часов-ехали поезда                                                                                                                 60*8+68*8=1004 км                                                                                                                                   задача:72-12=60м-стала длина забора                                                                                              26-7=19м-стала ширина забора                                                                                                            60*19=1140 м2

88|2                               136|2                                   222|2
44|2                                 68|2                                    111|3
22|2                                 34|2                                      37|37
11|11                                17|17                                      1|     
 1|                                       1|
88=2×2×2×11=2³×11      136=2×2×2×17=2³×17        222=2×3×37
246|2              385|5                   435|3             530|2
123|3                77|7                   145|5             265|5
  41|41               11|11                   29|29             53|53
    1|                     1|                         1|                   1|
246=2×3×41       385=5×7×11    435=3×5×29   530=2×5×53