1. 2x+3=3x 2.3+a/4=12 3. 5-x=3x+4 4. x-7+8x=9x-3-4x 5. 11x+42-2x=100-9x-22 6. 3x-20+6x-2=8x-10+2x 7. 8 (x+3) = 48 8. (b+2) 4=60 9. 5 (x-1) = 30 10. (2x-1) 9=36 11. 3 (y-5) + 8=17 12. 5 (x+2) = 6 (2x+7) 13. 5 (x+3) = 8 (10-x) 14. 8 (9+2x) = 5 (2-3x) 15. 6 (x-3) - 10=2 (x+2) 16. 5 (x-1) + 20=4 (x-3) 17. 10y+2 (7y-2) = 5 (4y+3) + 3y 18. 8 (3z-2) - 13z=5 (12-3z) + 7z 19.1/3 (2x-3) = 4 1/6x

1) 3 = 3 * x - 2 * х; х = 3;

2) 12 + a = 48; а = 36;

3) 3 * х + х = 1; х = 1/4;

4) (8 + 1 - 9 + 4) * х = 4; х = 1;

5) (9 + 9) * х = 36; х = 2;

6) х = - 12;

7) 8 * х = 48 - 24; х = 3;

8) 4 * b = 60 - 8; b = 13;

9) 5 * х = 30 + 5; х = 7;

10) 18 * х = 45; х = 2,5;

11) 3 * у = 24; у = 8;

12) 12 * х - 5 * х = 42 - 10; х = 32/7;

13) 5 * х + 8 * х = 80 - 15; х = 65/13 = 5;

14) 31 * х = - 62; х = - 2;

15) 4 * х = 32; х = 8;

16) х = - 27;

17) (10 + 14 - 20 - 3) * у = 19; у = 19/1 = 19;

18) (24 - 13 + 15 - 7) * z = 76; z = 76/19 = 4;

19) 25/6 * х - 4/6 * х = - 1;

21/6 * х = - 1; х = - 2/7.