Решите уравнения.

1. 8 + 4 (х - 2) = - 10 - х

2. 2 (5 - 2 х) - (х + 1) =

- 6

3. 3 - 7 х = - 5 (х + 3)

1). 8 + 4 (х - 2) = - 10 - х

8+4 х-8=-10-х

4 х+х=-10

5 х=-10

х=-2.

2). 2 (5 - 2 х) - (х + 1) = - 6

10-4 х-х-1=-6

-5 х=-6-9

-5 х=-15

х=3.

3). 3 - 7 х = - 5 (х + 3)

3-7 х=-5 х-15

-7 х+5 х=-15-3

-2 х=-18

х=9.

1) 8 + 4 (х - 2) = - 10 - х

8+4 х-8=-10-х

4 х+х=-10

5 х=-10

х=-2

2) 2 (5 - 2 х) - (х + 1) = - 6

10-4 х-х-1=-6

-5 х=-6+1-10

-5 х=-15

х=3

3) 3 - 7 х = - 5 (х + 3)

3-7 х=-5 х-15

-7 х+5 х=-15-3

-2 х=-18

х=9