Решите уравнения

1) - 3 (1+4 х) = - 4 х-5

2) - 6 (-5-7 х) = - 8 х+2

3) 9+2 (2 х+1) = 1

4) 4+3 (10 х+7) = - 5

5) 4+5 (-3 х+7) = - 9

6) 5+10 (-10 х-9) = - 3

7) - 7+2 (7 х-2) = 10

1

-3-12 х+4 х=-5

8 х=-2

х=-1/4

2

30+42 х+8 х=2

50 х=-28

х=-28/50

х=-0,56

3

9+4 х+2=1

4 х=-10

х=-10/4

х=-2,5

4

4+30 х+21=-5

30 х=-30

х=-1

5

4-15 х+35=-9

-15 х=-48

х=48/15

х=16/5

х=3,2

6

5-100 х-90=-3

-100 х=88

х=-0,88

7

-7+14 х-4=10

14 х=21

х=21/14

х=3/2

х=1,5

1) - 3 (1+4 х) = - 4 х-5

-3-12 х=-4 х-5

-12 х+4 х=3-5

-8 х=-2

х=-2: (-8)

х=0,25

2) - 6 (-5-7 х) = - 8 х+2

30+42 х=-8 х+2

42 х+8 х=-30+2

50 х=-28

х=-28:50

х=-0,56

3) 9+2 (2 х+1) = 1

9+4 х+2=1

4 х=1-9-2

4 х=-10

х=-10:4

х=-2,5

4) 4+3 (10 х+7) = - 5

4+30 х+21=-5

30 х=-5-4-21

30 х=-30

х=-30:30

х=-1

5) 4+5 (-3 х+7) = - 9

4-15 х+35=-9

-15 х=-9-4-35

-15 х=-48

х=-48: (-15)

х=3,2

6) 5+10 (-10 х-9) = - 3

5-100 х-90=-3

-100 х=-3-5+90

-100 х=82

х=82: (-100)

х=-0,82

7) - 7+2 (7 х-2) = 10

-7+14x-4=10

14x=10+7+4

14x=21

x=21:14

x=1,5