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

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.