Question

решите пожалуйста!!!

1. 4y + 7 = 5y + 4;

2. 35 - 11m = 3m + 21;

3. 10 - 9y = 70 - 6y;

4. -9x - 56 = 5x;

5. 56 - 9n = -5n;

6. 15 - 8x = 2 - 9x;

7. 10z + 7 = 9z + 5;

8. 17 - 8y = 4y - 7;

9. 10 - 11n = 15 - 12n;

10. -9z + 32 = 7z;

11. 25 - 12m = 45 - 8m;

12. 5y + 15 = 4y + 20.

Answer 1

1) y=3
2)m=1
4)x=14
5)n=4
8)y=2
9)n=5
10)z=2
12)y=5