1) 5х -5 - 4х - 3 = 2

5х - 4х = 2 + 5 + 3

x = 10

2) 7x - 9 - 2(4 + 2x) = 16

7x - 9 - 8 - 4x = 16

7x - 4x = 16 + 9 + 8

3x = 33

x = 11

3) (-4 + 2x) × 6 = 16 + 2x

-24 + 12x = 16 + 2x

12x - 2x = 16 + 24

10x = 40

x = 4

4) 1,2(14 - 10x) + 6(2 - 0,4x) = 0

16,8 - 12x + 12 - 2,4x = 0

-12x - 2,4x = - 16,8 - 12 | × (-1)

12x + 2,4x = 16,8 + 12

14,4x = 28,8

x = 2

5) x/3 - 3x/7 = - 4/21 | × 21

7x - 9x = -4

-2x = -4

x = 2

6) 6 - 5(3,6 - x)/7 = 2 | × 7

42 - 18 + x = 14

x = 14 - 42 + 18

x = -10

Ответ:

1) 0

2) -11

3) -4

4) 2

5) -10,31

6) 2

Пошаговое объяснение:

1) 5x-5-4x-3=2

9x = 0

x = 0

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

2) 7x - 9 - 2(4 + 2x) = 16

7x-9-8+4x=16

7x-4x=-16-9-8

3x=-33

x=-11

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

3) (-4+2x)×6=16+2x

-24+12x=16+2x

12x-2x=-24-16

10x=-40

x=-4

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

4) 1,2(14-10x)+6(2-0,4x)=0

16,8-12x+12-2,4x=0

12x-2,4x=16,8+12

14,4x=28,8

x=2

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

5)x/3 - 3x/7 = -4/21

7x - 9x. -2x

------------ = ------------ = -10,5

21. 21

-4÷21= -0.19

-10,5+0,19= -10,31

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

6) 5 (3,6-x)

6- ------------- =2

7

18-x

6- -------------- = 2

7

18- (6-2) / 7

18- 4 / 7

14/7

2

P.S.: Надеюсь я правильно и понятно объяснил.