1. 26-5m=2-9m

2. 9z+11=13z-1

3. 12a+31=23a-2

4. 2 (x-2) - 1=5 (x-2) - 7

5. - y+20=-y

6. 4 (2y-6) = 4y-4

7. - 9n+3=3 (8n+45)

8. 20+5m=44+m

9. 27-4k=3-8k

10. 5b+11=7b-3

11. 8a+11=4a-1

1.

26-5m=2-9m

9m-5m=2-26

4m=-24

m=-24/4

m=6

2.

9z+11=13z-1

9z-13z=-11-1

-4z=-12

z=12/4

z=3

3.

12a+31=23a-2

12a-23a=-31-2

-11a=-33

a=33/11

a=3

4.

2 (x-2) - 1=5 (x-2) - 7

2x-4-1=5x-10-7

2x-5=5x-17

2x-5x=5-17

-3x=-12

x=12/3

x=4

5.

-y+20=-y

какое то некорректное

6.

4 (2y-6) = 4y-4

8y-24=4y-4

8y-4y=24-4

4y=20

y=20/4

y=5

7.

-9n+3=3 (8n+45)

-9n+3=24n+135

-9n-24n=-3+135

-33n=132

n=-132/33

n=-4

8.

20+5m=44+m

-m+5m=44-20

4m=24

m=24/4

m=6

9.

27-4k=3-8k

8k-4k=3-27

4k=-24

k=-24/4

k=6

10.

5b+11=7b-3

5b-7b=-11-3

-2b=-12

b=12/2

b=6

11.

8a+11=4a-1

8a-4a=-11-1

4a=-12

a=-12/4

a=3