Rozwiązane

4. Rozwiąż równania. a) 5x - 3 +3 = 2x 4 c) 4 1/2 - 2x - 2 5-x-3 X53 = 5X 1.3 i 15 - X+3 = 5x 1 -6x = -18 1:(-6) x = 3 ) X- 2x + 3 5 = 3 d) *x + 4 = x+2 e) 3x-2 -2 = POTRZEBNE NA SZYBKO​



4 Rozwiąż Równania A 5x 3 3 2x 4 C 4 12 2x 2 5x3 X53 5X 13 I 15 X3 5x 1 6x 18 16 X 3 X 2x 3 5 3 D X 4 X2 E 3x2 2 POTRZEBNE NA SZYBKO class=

Odpowiedź :

Odpowiedź:

zad 4

(5x - 3)/4 + 3 = 2x | * 4

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

5x - 3 + 12 = 8x

5x - 8x = 3 - 12

- 3x = - 9

3x = 9

x = 9/3 = 3

b)

x - (2x + 3)/5 = 3 | * 3

3x - (2x + 3) = 3 * 3

3x - 2x - 3 = 9

x - 3 = 9

x =9 + 3 = 12

c)

4 - x/4 = 2x - 1/2 | * 4

4 * 4 - x = 2x * 4 - 1/2 * 4

16 - x = 8x - 2

- x - 8x = - 2 - 16

- 9x = - 18

9x = 18

x = 18/9 = 2

d)

2x/3 + 4 = (x + 2)/3 | * 3

2x + 4 * 3 = x + 2

2x + 12 = x + 2

2x - x = 2 - 12

x = - 10

e)

(3x - 2)/5 - 2 = x/5 | * 5

3x - 2 - 2 * 5 = x

3x - 2 - 10 = x

3x - x = 2 + 10

2x = 12

x = 12/2 = 6