654 -1+8(7-6x)=2x+6 655 -2+3(1+2x)=-2x+3 656 -3x+4=-10+5(-7-x) 657 3x-10=2+6(5+4x) 658 5x-4=4-3(5-2x) 659

1) -1 + 8 * (7 - 6х) = 2х + 6;

-1 + 56 - 48х = 2х + 6;

-1 + 56 - 6 = 2х + 48х;

55 - 6 = 50х;

49 = 50х;

х = 49/50.

2) -2 + 3 * (1 + 2х) = -2х + 3;

-2 + 3 + 6х = -2х + 3;

6х + 2х = 3 + 2 - 3;

8х = 5 - 3;

8х = 2;

х = 2 : 8;

х = 1/4.

3) -3х + 4 = -10 + 5 * (-7 - х);

-3х + 4 = -10 - 35 - 5х;

-3х + 5х = -10 - 35 - 4;

2х = -49;

х = -49 : 2;

х = -24 1/2.

4) 3х - 10 = 2 + 6 * (5 + 4х);

3х - 10 = 2 + 30 + 24х;

3х - 24х = 2 + 30 + 10;

-21х = 42;

х = 42 : (-21);

х = -2.

5) 5х - 4 = 4 - 3 * (5 - 2х);

5х - 4 = 4 - 15 + 6х;

-4 - 4 + 15 = 6х - 5х;

х = 7.

6) 4 - 2 * (5 + 4х) = -х + 1;

4 - 10 - 8х = -х + 1;

4 - 10 - 1 = -х + 8х;

-7 = 7х;

х = -7 : 7;

х = -1.