Памагити(с доскональным решением)5х 2 = 812 3x = 734(x

Ответ:

5х 2 = 8

5х=8+2

Х=10:5

Х=2

12 3x = 7

-3х=7-12

-3х=-5

Х=-5:(-3)

Х=1 2/3

34(x - 2) = 2

34х-68=2

34х=68+2

34х=70

Х=70/34=2 1/17

12 (x - 2) = 3

12-х+2=3

Х=12+2-3

Х=11

21x 3 = 12

21х=12+3

21х=15

Х=15/21=5/7

3 4x = -5

-4х=-5-3

-4х=-8

Х=-8:(-4)

Х=2

35(x + 1) = -14

Х+1=-14/35=-2/5

Х=-2/5-1

Х=-1 2/5

11(x - 3) = 33

Х-3=33:11

Х-3=3

Х=3+3

Х=6

3x + 12 = 3

3х=3-12

3х=-9

Х=-9:3

Х=-3

5x 2 = 13

5х=13+2

5х=15

Х=15:5

Х=3

2(x - 4) = 15

Х-4=15:2

Х-4=7,5

Х=7,5+4

Х=11,5

14 (x 2) = 23

14-х+2=23

Х=14+2-23

Х=-7

3x 12 + x = 4

2х=4+12

2х=16

Х=16:2

Х=8

4x 21 = 4

4х=4+21

4х=25

Х=25/4=6 1/4

3x + 12 2x = 11

Х=11-12

Х=-1

Подробнее - на Znanija.com - znanija.com/task/31740501readmore

Пошаговое разъяснение:

5х 2 = 8

5х=8+2

Х=10:5

Х=2

12 3x = 7

-3х=7-12

-3х=-5

Х=-5:(-3)

Х=1 2/3

34(x - 2) = 2

34х-68=2

34х=68+2

34х=70

Х=70/34=2 1/17

12 (x - 2) = 3

12-х+2=3

Х=12+2-3

Х=11

21x 3 = 12

21х=12+3

21х=15

Х=15/21=5/7

3 4x = -5

-4х=-5-3

-4х=-8

Х=-8:(-4)

Х=2

35(x + 1) = -14

Х+1=-14/35=-2/5

Х=-2/5-1

Х=-1 2/5

11(x - 3) = 33

Х-3=33:11

Х-3=3

Х=3+3

Х=6

3x + 12 = 3

3х=3-12

3х=-9

Х=-9:3

Х=-3

5x 2 = 13

5х=13+2

5х=15

Х=15:5

Х=3

2(x - 4) = 15

Х-4=15:2

Х-4=7,5

Х=7,5+4

Х=11,5

14 (x 2) = 23

14-х+2=23

Х=14+2-23

Х=-7

3x 12 + x = 4

2х=4+12

2х=16

Х=16:2

Х=8

4x 21 = 4

4х=4+21

4х=25

Х=25/4=6 1/4

3x + 12 2x = 11

Х=11-12

Х=-1