Question

ROZWIAZ ROWNIANIE I SPRAWDZ:

a> 10 9/20 - x = 7 9/12

b> x - 61 7/24 = 100 13/18

c> 9 1/24 - x = 2 11/36

taki liczby -> 1/2 <- to ułamki

Answer 1

a)

10 9/20 - x = 7 9/12
209/20 - x = 93/12    /*60
627 - 60x = 465
-60x = 465 - 627
-60x = -162    /:(-60)
x = 2,7

Spr. 

L = 209/20 - 2,7 = 7,75

P = 93/12 = 7,75

 

 

 

b)
x - 61 7/24 = 100 13/18
x - 1471/24 = 1813/18    /*144
144x - 8826 = 14504
144x = 23330   /:144
x = 11665/72 = 162 i 1/72  

Spr.

L = 11665/72 - 1471/24 = 100,7(2)

 

 

P = 1813/18 = 100,7(2)

 

c)
9 1/24 - x = 2 11/36
217/24 - x = 83/36   /*144
1302 - 144x = 332
-144x = -970    /:(-144)
x = 6 i 53/72

Spr.

L = 217/24 - 485/72 = 2,30(5)

 

 

P = 83/36 = 2,30(5)