Question

Zadanie z matematyki

Answer 1

Daje ci od razu rozwiazania(nie przepisuje przykladow):

a) 8/3x+2/3=2

8/3x=1 i 1/3 /*3

8x=4 / :8

x=0.5

b) 5/8x=3/4-2

5/8x=10/8x /*8

5x=10 / :5

x=2

c)  1/2x=-3 /*2

x=-6

d)   1/3x-1=4

1/3x=5 /*3

x=15

e)  5/2x-2=16/7x+1/7

16/7x-5/2x=2 i 1/7 /*7

32/2x-35/2x=15

1.5x=15 / :1.5

x=10

f)  5/8-1/8z=18/12-5/12z

5/8-18/12=-5/12z+1/8z  /*4

2.5-6=-1 i 2/3z+0.5z

-3.5=-50/30z+15/30z

-3.5=-35/30z  /*-30

35=35z /:35

z=1

 

Answer 2

A). 1i1/3x + 2/3 = 2

1 i 1/3x = 2 -2/3

1 i 1/3x = 1 i 1/3

x = 1

 

B). 5/8x + 2 = 3/4

5/8x = -2 + 3/4

5/8x = -1 i 1/4 /*8

5x = - 10

x = -2

 

c) x + 5 - 1/2 x = 2

1/2 x = 2 - 5

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

x =  -3*2/1

x = - 6

 

D) x-3/3  = 4 /*3

x - 3 = 12

x = 12 + 3

x = 15

 

E) 5x - 4 /2 =  16x +1 /7 /*14

35x - 28 = 32x + 2

35 x - 32 x = 2 +28

3 x = 30

x = 10

 

F) 5-z/8  = 18 - 5 z/12 /*24

15 - 3z = 36 - 10 z

- 3 z + 10 z = 36 - 15

7 z = 21/7

z = 3