Question

DAM NAJJJ BŁAGAMM poziom C i D podpunkty a b c

Answer 1

Odpowiedź:

Szczegółowe wyjaśnienie:

8-3x=6x-10

-3x-6x=-10-8

-9x=-18 /:-9

x=2

7x-4=9+8x

7x-8x=9+4

-x=13 /:-1

x=-13

-5+7x=2x-20

7x-2x=-20+5

5x=-15 /:5

x=-3

poziom D

5x-3+2x=4x+9

5x+2x-4x=9+3

3x=12 /:3

x=4

8x-6-9x=5x-6

-x-5x=-6+6

-6x=0/:-6

x=0

2+4x-1+2x=-8+4x-7

6x+1=-15+4x

6x-4x=-15-1

2x=-16/:2

x=-8

Answer 2

POZIOM C

a) 8 - 3*x = 6*x - 10

8 - 3x = 6x - 10

-3x - 6x = - 10 - 8

- 9x = - 18 /: (-9)

x = 2

b) 7*x -4 = 9 + 8*x

7x - 4 = 9 +8x

7x - 8x = 9 + 4

-x = 13  /: (-1)

x = -13

c) -5 + 7*x = 2*x - 20

-5 +7x = 2x - 20

7x - 2x = -20 + 5

5x = -15    /  : 5

x = -3

POZIOM D

a) 5*x - 3 + 2*x = 4*x + 9

5x - 3 + 2x = 4x + 9

5x + 2x - 4x = 9 + 3

3x = 12 / : 3

x = 4      

b) 8*x - 6 - 9*x = 5*x - 6

8x - 6 -9x = 5x - 6

8x - 9x -5x = -6 + 6

- 6x = 0  /: (-6)

x = 0

c) 2 + 4*x - 1 +2*x = -8 + 4*x - 7

2 + 4x - 1 +2x = -8 + 4x - 7

4x + 2x - 4x = -8 - 7 + 1 - 2

2x = -16  / : 2

x = -8