Question

Zadanie w załączniku. Za dobre rozwiązania i wyniki dam naj

Answer 1

a) 4x - 8 = 3 + 3x - 2x + 10 - 6

4x - 3x - 2x = 8 + 3 + 10 - 6

-x = 15 / * (-1)

x = -15

 

b) x^2 - 2x - x^2 + 2x + 3 = 2x + 1

-2x = 1 -3

-2x = -2 / :(-2)

x = 1

 

c) 2x - x-1/3 = 2 / *3

6x - x - 1 = 6

6x - x = 6 +1

5x = 7 / :5

x = 1 2/5

 

d) 2x - 4 = 2 + x+2/3     /*3

6x - 12 = 6 + x + 2

6x - x = 6 + 2 +12

5x = 20 /:5

x = 4

 

e) 4x - 2x+1/3 = 6 - 3x   /*3

12x - 2x + 1 = 18 - 9x

12x - 2x + 9x = 18 - 1

19x = 17 / :19

x = 0,90

 

f) 2x-2/3  -  12 + 3x + 10x+10/2  - 2 - 2x = 5   /*6

2 * 2x - 2 - 72 + 18x + 3 * 10x + 10 - 12 - 12x = 30

4x - 4 - 72 + 18x + 30x + 30 - 12 - 12x = 30

4x + 18x + 30x - 12x = 30 + 4 + 72 - 30 + 12

40x = 88 / :40

x = 2,2