В треугольнике АВС точка М -- середина стороны ВС.

  216724     : 42                                     21324         : 37

  210           -----------                              185             ---------

---------          516                                 ---------            576

      67                                                       282

      42                                                       259

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      252                                                       234

      252                                                       222

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          0 -  остача 4                           остача 12

Ответ:

Пошаговое объяснение:

3(х-2)=4х

3x - 6 = 4x

4x - 3x = -6

x = -6

6(z-1)=18

6z - 6 = 18

6z = 18 + 6

6z = 24

z = 24 : 6

z = 4

5(y+3)=10

y + 3 = 10:5

y + 3 = 2

y = 2 - 3

y = -1

3(2x-7)=9

6x - 21 = 9

6x = 9+21

6x = 30

x = 30 :6

x = 5

-4(x-2)=-6  

-4x + 8 = -6

4x = 8+6

4x = 14

x = 14 : 4

x = 3,5

3(x-5)=x+3

3x - 15 = x + 3

3x - x = 3 + 15

2x = 18

x = 18 : 2

x = 9