Question

ajutor. urgent! dau coroana!​

Answer 1

Răspuns:

Explicație pas cu pas:

2x + 5 = 7 + x

2x - x = 7 - 5

x = 2

_____________

3 - 7x = 2x + 21

2x + 7x = 3 - 21

9x = -18

x = -18 : 9 = -2

_______________

1 - 4x = x + 16

4x + x = 1 - 16

5x = -15

x = -15 : 5 = -3

_______________

7 - 5x = 2x - 7

5x + 2x = 7 + 7

7x = 14

x = 14 : 7 = 2

________________

7 - 2x = 5x - 14

5x + 2x = 7 + 14

7x = 21

x = 21 : 7 = 3

___________________

9x - 4 = 5x + 8

9x - 5x = 4 + 8

4x = 12

x = 12 : 4 = 3

__________________

5x - 1 = 8x + 11

8x - 5x = -1 - 11

3x = -12

x = -12 : 3 = -4

__________________

3x - 1 = 5x + 9

5x - 3x = -1 - 9

2x = -10

x = -10 : 2 = -5

________________

6x - 5 = 3x + 7

6x - 3x = 5 + 7

3x = 12

x = 12 : 3 = 4