Question

Rozwiąż równania i sprawdź :

2x=5
4a=7
15-x=7 i 1/3
m-1 i 5/6
25:b=6
d:4=5 i 1/2
Z góry dziex

Answer 1

2x=5

x=2,5    2*2,5=5
4a=7

a=1,75   1,75*4=7
15-x=7 i 1/3

x=7 2/3    15-7 2/3=71/3
m-1 i 5/6<-- nie wiem o co biega, napisz na priv 
25:b=6

25=6b

b=4 i 1/6   4 1/6 * 6= 25
d:4=5 i 1/2

d=22

22/4=5,5

Answer 2

2x = 5 /:2

  x = 5/2

spr.

L = 2 * 5/2=  10/2 = 5

P = 5

L = P

 

4a = 7 /:4

a  = 7/4

spr.

L = 4 * 7/4 = 1 * 7/1 = 7

P = 7

L = P

 

15 - x = 7i1/3

- x = 7i1/3 - 15

- x = 7i1/3 - 14i3/3

 - x = -7i2/3 /*(-1)

  x = 7 i2/3

spr.

L = 15 - 7i2/3 = 14i3/3 - 7i2/3 = 7i1/3

P = 7i1/3

L = P

 

25:b =6

b = 25: 6

b = 25/6

spr.

L= 25 : 25/6 = 25 * 6/25 = 1 *6/1 = 6

P = 6

L = P

 

d : 4 = 5i1/2

d= 5i1/2 *4

d = 11/2 * 4

d = 44/2

 d = 22

spr.

L = 22 : 4 = 22/4 = 5i2/4 = 5 i1/2

P = 5i1/2