2=(3x-5)-(7-4x) 8x+5=119+(7-3x) 3(2x-3)=8(5x+6) 8(3x-2)=6(6x+5)

№1

2 = (3x - 5) - (7 - 4x);

3х - 5 - 7 + 4х = 2;

3х + 4х = 2 + 5 + 7;

7х = 7 + 7;

7х = 14;

х = 14 : 7;

х = 2.

Ответ: х = 2.

№2

8x + 5 = 119 + (7 - 3x);

8х + 5 = 119 + 7 - 3х;

8х + 3х = 119 + 7 - 5;

11х = 126 - 5;

11х = 121;

х = 121 : 11;

х = 11.

Ответ: х = 11.

№3

3(2x - 3) = 8(5x + 6);

3 * 2х - 3 * 3 = 8 * 5х + 8 * 6;

6х - 9 = 40х + 48;

6х - 40х = 48 + 9;

-36х = 57;

х = 57 : (-36);

х = -57/36 = -1 21/36 = -1 7/12.

Ответ: х = -57/36 = -1 7/12.

№4

8(3x - 2) = 6(6x + 5);

8 * 3х - 8 * 2 = 6 * 6х + 6 * 5;

24х - 16 = 36х + 30;

24х - 36х = 30 + 16;

-12х = 46;

х = 46 : (-12);

х = -46/12 = -3 10/12 = -3 5/6.

Ответ: х = -46/12 = -3 5/6.