Уравнение1 7x + 1 = 152 25x - 52 =233 6x +11 = 2x

Пошаговое изъясненье:

Уравнение

1 7x + 1 = 15

7х=14

х=2

2 25x - 52 =23

25х=75

х=5

3 6x +11 = 2x - 5

4х=-16

х=-4

4 10 +22,7x = 4,7x +28

18х=18

х=1

5 8,2 - 3x = 11,7 + 2x

-5х=3,5

х=-0,7

6 5 (x-2) = 4x +17

5-х+2=4х+17

-5х=10

х=-2

7 10x + 2,5 = 12 (10x 10,5)

10х+2,5=12-10х+10,5

20х=20

х=1

8 87 2x = 2(4x+56)

87-2х=8х+112

-10х=25

х=-2,5

9 3(x + 1 ) + 11 = 34 2x

3х+3+11=34-2х

5х=20

х=4

10 4 + 5(2x+1) = 39

4+10х+5=39

10х=30

х=3

11 2x + 8 + x = 13 x + 19

4х=24

х=6

12 -12(2 x) = 6x + 48

-24+12х=6х+48

6х=12

х=2

13 35 7(5 - x) = x + 12

35-35+7х=х+12

6х=12

х=2

14 49x = 270 (x + 20)

49х=270-х-20

50х=250

х=5

15 -11x +52 = 46x (48+ 37x)

-11х+52=46х-48-37х

26х=-100

х=-3,8

16 7,2x 6 = 2,2x + 14

5х=20

х=4

17 3,6 1,2x =1,4x 1,6

-2,6х=5,2

х=-2

18 1,5 + 5,2x = (4,8x 1) 6,7

1,5+5,2х=4,8х-1-6,7

0,4х=-9,2

х=-23

19 850 225x = 400

-225х=-450

х=2

20 159x 21,87 = 84x + 278,13

75х=300

х=4