Ответ:

Пошаговое объяснение:

-6(x + 2) = 4x - 17

-6x - 12 = 4x - 17

4x + 6x = 17 - 12

10x = 5

x = 5 : 10

x = 0,5

--------------------

(18x - 19) - (4 - 7x) = -73

18x - 19 - 4 + 7x = -73

25x - 23 = -73

25x = -73 + 23

25x = -50

x = -50 : 25

x = -2

-------------------------------

10x + 3(7 - 2x) = 13 + 2x

10x + 21 - 6x = 13 + 2x

4x + 21 = 13 + 2x

4x - 2x = 13 - 21

2x = -8

x = -8 : 2

x = -4

----------------------------

-3(4 - 5y) + 2(3 - 6y ) = -3,9

-12 + 15y + 6 - 12y = -3,9

-6 + 3y = -3,9

3y = -3,9 + 6

3y = 2,1

y = 2,1 : 3

y = 0,7