Решите уравнения: 1) 8-5x+x=16; 2) 4,8x-5,5-x=18,8; 3) 12x-5,9-7,5x+3,2=-4,05; 4) 9,1x+2-x-6=-52,6.

1) 8 - 5x + x = 16;

-5x + x = 16 - 8;

-4 х = 16 - 8;

-4 х = 8;

х = 8 : (-4);

х = - 2.

2) 4,8x - 5,5 - x = 18,8;

4,8x - x = 18,8 + 5,5;

3,8x = 18,8 + 5,5;

3,8x = 24,3;

х = 6,4.

3) 12x - 5,9 - 7,5x + 3,2 = - 4,05;

12x - 7,5x = - 4,05 + 5,9 - 3,2;

4,5x = - 4,05 + 5,9 - 3,2;

4,5x = - 7,25 + 5,9;

4,5x = - 1,35;

х = - 1,35 : 4,5;

х = - 0,3.

4) 9,1x + 2 - x - 6 = - 52,6;

9,1x - x = - 52,6 - 2 + 6;

8,1x = - 52,6 - 2 + 6;

8,1x = - 54,6 + 6;

8,1x = - 48,6;

x = - 48,6 : 8,1;

х = - 6.