Question

Va rog urgent
Dau coroana ​

Answer 1

Răspuns:

1. a ) - 10 ; b ) 5

2. x > 2

Explicație pas cu pas:

1. a )

4x + 19 = 2x - 1

4x - 2x = - 1 - 19

2x = - 20 ⇒ x = - 20 : 2

x = - 10

b )

4 ( x + 5 ) - x + 5 = 5 ( x + 3 )

4x + 20 - x + 5 = 5x + 15

3x + 25 = 5x + 15

3x - 5x = 15 - 25

- 2x = - 10 ⇒ x = - 10 : ( - 2 )

x = 5

2.

5x - 10 > - 2x + 4

5x + 2x > 4 + 10

7x > 14 ⇒ x > 14 : 7

x > 2.