Ответ:

Пошаговое объяснение:

(12x-13)+(7-4x)=26

12x - 13 + 7 - 4x = 26

8x - 6 = 26

8x = 26+6

8x = 32

x = 32:8

x = 4

3,4(−5+x)=0,6(2x−43)

-17 + 3,4x = 1,2x - 25,8

3,4x - 1,2x = -25,8 + 17

2,2x = -8,8

x = -8,8 : 2,2

x = -4

4(14-4x)-10x=-10x+136

56 - 16x - 10x = -10x + 136

-26x + 56 = -10x + 136

26x - 10x = 56 - 136

16x = -80

x = -80:16

x = -5

4(4x−10)=−3(−3x+4)

16x - 40 = 9x - 12

16x - 9x = 40 - 12

7x = 28

x = 28:7

x = 4

5(4,4+5x)=2,5(2,3−3x)

22 + 25x = 5,75 - 7,5x

25x + 7,5x = 5,75 - 22

32,5x = -16,25

x = -16,25 : 32,5

x = -0,5

1) (12x-13)+(7-4x)=26

12x-13+7-4x=26

8x=26+13-7

8x=32

x=4

2) 3,4(-5+x)=0,6(2x-43)

-17+3,4x=1,2x-25,8

3,4x-1,2x=-25,8+17

2,2x=-8,8

x=-4

3) 4(14-4x)-10x=-10x+136

56-16x-10x=-10x+136

-26x+10x=136-56

-16x=80

x=-5

4) 4(4x−10)=−3(−3x+4)

16x-40=9x-12

16x-9x=-12+40

7x=28

x=4

5) 5(4,4+5x)=2,5(2,3−3x)

22+25x=5,75-7,5x

25x+7,5x=5,75-22

32,5x=-16,25

x=-0,5