ланейная уравнения

Ответ:

1)7х-5 = 3х+1

7х-3х = 1+5

4х = 6

х = 1,5

2)6х-2 = 4х+6

6х-4х = 6+2

2х = 8

х = 4

3)9х = 7+8

9х = 15

х = 15/9 = 5/3 = 1 2/3

4)х-6 = 2х+8

х-2х = 8+6

-х = 14

х = -14

5)11х-5 = 20х+20

11х-20х = 20+5

-9х = 25

х = -(25/9) = -2 7/9.

Ответ:

Изъясненье:

1) 7х-5=3х+1

4x=6

x = 6/4 = 3/2

2) 6x-2=4x+6

2x=8

x=4

3) 9x = 7+8

9x = 15

x = 15/9 = 5/3

4) x-6 = 2x+8

-x = 14

x = -14

5) 11x-5=20x+20

-9x = 25

x = -25/9