Question

Równania kto rozwiąze... w załączniku

Mam nadzieje ze rozczytacie ;d

Answer 1

zal 1

1)

3x + 7 = 2x + 1

3x - 2x = 1 - 7

x = -6

 

2)

6x + 2x - 10 = 3x + 5

8x - 3x = 5 + 10

5 x = 15

x = 3

 

3)

4x + 2 + 5x - 3 = 6x - 4 - 7x + 5

9x - 6x + 7x = 1 + 3 -2

10x = 2

x = 2/10 = 1/5

 

4)

5(x-7) + 2 = (-28)

5x - 35 + 2 = - 28

5x = -28 + 35 -2

5x = 5

x = 1

 

5)

(x-1) + 3 (x+1) = 26

x-1 + 3x + 3 = 26

4x = 26 - 3 +1

4x = 24

x = 6

 

6)

x + 5= 2 (4x + 25)

x + 5 = 8x + 50

x - 8x = 50 - 5

-7x = 45

x = - 6 3/7

 

zalacznik2

a) pewnosci nie mam co jest tam napisane

5x -4 = - 2x + 1

5x + 2x = 1 + 4

7x = 5             /:7

x = 5/7

 

b) 6x = 2x - 10 = 3x + 5

8x - 3x = 5 = 10

5x = 15      /:5

x = 3

 

c)

4x + 2 + 5x -3 = 6x -4 - 7x + 5

9x - 6x = 7x = 1 + 3 - 2

10 x =2          /:10

x = 2/10 = 1/5

 

d) 

5(x-7) + 2 = (-28)

5x - 35 + 2 = - 28

5x = -28 + 35 -2

5x = 5

x = 1

 

e)

2(x-1) + 3 (x+1) = 26

2x - 2 = 3x = 3 = 26

5x = 26 - 3 + 2

5x = 25             /: 5

x = 5

 

f)

8x + 5 = 2 (4x + 2,5)

8x + 5 = 8x + 5

8x - 8x = 5-5

0 = 0

prawda, rozwiazaniem jest kazda liczba rzeczywista

 

g)

(x + 4)/2 - 5 = (-3)           /*2

x + 4 - 10 = -6

x = -6 + 10 -4

x = 0

 

 

zal 3

i)

(3x +2)/4 + 5 = (2x +1 )/3          /*4

3x +2 +20 = 4(2x+1)/3                /*3

9x + 6 + 60 = 8x +4

9x - 8x = 4 - 66

x = - 62

 

j)

(2x + 1 -3)/4 = x/5     /*4

2x - 2 = 4x/5              /*5

10x - 10 = 4x

10x - 4x = 10

6x = 10                 /:6

x = 10/6 = 1 2/3

 

k)

18 - 3(x + 9) = (-3) (3 + x)

18 - 3x - 27 = -9 - 3x

-3x + 3x = -9 + 27 - 18

0 = 0

to rownanie spelniaja wszystkie liczby rzeczywiste

 

l)

(12-x)/4 = (x+4)/12       

(36 - 3x)/12 = (x+4)/12              /*12

36 - 3x = x + 4

-3x - x = 4 - 36

- 4x = - 32

x = 8

 

#L)

5x - 6 ( x+7) = 8x - 9 (10 + x)

5x - 6x - 42 = 8x - 90 - 9x

-x - 8x + 9x = - 90 + 42

0x = -48 falsz

 

m)

x/3 = (2x - 5)/6

2x/6 = (2x - 5)/6

2x = 2x -5

2x - 2x = -5

0 = -5

falsz

nie ma rozw.

 

n)

(x+3)/2 = (x+1)/3

(3x +9)/6 = (2x +2)/6            /*6

3x +9 = 2x +2

3x - 2x = 2 - 9

x = -7

 

o)

2x (5 + x) -2 = 6 (x-2) + 2x²

10 x + 2x² -2 = 6x - 12 + 2x²

10x + 2x² - 6x - 2x² = -12 +2

4x = -10

x = - 10/4 = - 2 1/2

 

p)

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

(6x +9)/15 = (10 - 5x)/15 - x               /* 15

6x + 9 = 10 - 5x - x

6x + 5x - x = 10 -9

10 x = 1

x = 1/10

 

r)

(x+1)/2 - (x-1)/3 = 1/4

(6x +6)/12 - ( 4x -4)/12 = 3/12      /* 12

6x + 6 - 4x + 4 = 3

2x = 3-4-6

2x = -7

x = - 7/2

x = - 3 1/2