Question

Exercitiile din imaginea. URGENT

Answer 1

Răspuns:

2x + 4· ( x-1)= 5x

2x + 4x- 4 = 5x

6x-5x=4

x=4

2+2·( 2+2 · ( x+2))= 14

2+2·( 2+ 2x + 4)= 14

2+ 2· ( 6 + 2x) = 14

2+ 12 + 4x = 14

14 - 14 = 4x

4x=0

x=o

3· (2x+1) - 5(x+2)= 3x-4

6x+3 - 5x - 10= 3x + 4

x - 7= 3x + 4

-7 - 4 = 3x - x

- 11= 2x

x= -11 : 2

5x - 4( 2x+3) = 3-2( 4- 5x)

5x -8x - 12= 3-8 + 10x

3x - 12= -5 + 10x

3x - 10x= 12-5

-7x= 7

-x= -1

x=1

7(x+1) = 3(x-2) - 4(5-x)

7x+7= 3x - 6 - 20 + 4x

7x+7= 7x - 26

7x-7x= - 26- 7

x= - 33