Question

exercitiu 14 va rog tot va rog dau coroana!!​

Answer 1

Răspuns:

Explicație pas cu pas:

/x/ = 7

x = 7

x = -7

________

/x - 2/ = 3

x - 2 = 3

x = 5

x - 2 = -3

x = -3 + 2 = -1

_________

/2x - 3/ = 11

2x - 3 = 11

2x = 11 + 3 = 14

x = 7

2x - 3 = -11

2x = -11 + 3 = -8

x = -4

_____________

/-x/ = /-5/ = 5

-x = 5

x = -5

-x = -5

x = 5

_____________

/-x + 3/ = 7

-x + 3 = 7

x = 3 - 7 = -4

-x + 3 = -7

x = 7 + 3 = 10

______________

/-2x+2/ - 4 = 16

/-2x + 2/ = 16 + 4 = 20

-2x + 2 = 20

2x = 2 - 20 = -18

x = -9

-2x + 2 = -20

2x = 20 + 2 = 22

x = 11

_______________

/x + 1/ = 3

x + 1 = 3

x = 3 -1 = 2

x + 1 = -3

x = - 3 - 1 = -4

____________________

/-2x/ + 1 = 15

/-2x/ = 15 - 1 = 14

-2x = 14

x = -7

-2x = -14

x = 7

_______________________

14 - /-x + 4/ = 8

/-x + 4/ = 14 - 8 = 6

-x + 4 = 6

x = 4 - 6 = -2

-x + 4 = -6

x = 4 + 6 = 10