Rozwiązane

Zad.3
3x+7=21
5x-1=19
-3x-3=-15
-4x+2=18
3x-7=-1
9-2x=23
-2-4x=10
-6-2x=12
14+5x=-1
8x+7=39

Zad.4
5x-3-2x=15
6x+1+x=15
-4x-2+10x=10
-x-4-x-1=-9
4-2x-x=-14
1-x-2+5x=7
-8x-2+5x-9=4
10x-4x+2=20
4=-6x-2+4x
-15=x-9+5x



Odpowiedź :

Lzdanowicz25

Odpowiedź:

Zadanie 3

3x + 7 = 21

3x = 21 - 7

3x = 14

x = 14/3 = 4 2/3

5x - 1 = 19

5x = 20

x = 4

-3x -3 = -15

-3x = -12

x = 4

-4x + 2 = 18

-4x = 16

x = -4

3x -7 = -1

3x = 6

x = 2

9 - 2x = 23

-2x = 23 -9

-2x = 14

x = -7

-2 - 4x = 10

-4x = 12

x = -3

-6 -2x = 12

-2x = 18

x = -9

14 + 5x = -1

5x = -15

x = -3

8x + 7 =39

8x = 32

x = 4

Zadanie 4

5x - 3 - 2x = 15

2x = 18

x = 9

6x + 1 + x = 15

7x = 14

x = 2

-4x - 2 + 10x = 10

6x = 12

x = 2

-x -4 -x -1 = -9

-2x = -4

x = 2

4 -2x - x = -14

-3x = -18

x = 6

1 - x - 2 + 5x = 7

4x = 8

x = 2

-8x -2 +5x -9 =4

-3x -11 = 4

-3x = 15

x = -5

10x - 4x +2 = 20

6x = 18

x = 3

4 = -6x -2 + 4x

2x = -6

x = -3

15 = x -9 +5x

-6x = -24

x = 4

Pozdrawiam.

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