Question

Vă rog cât mai repede. Dau coroană si 5 stele ;)​

Answer 1

Explicație pas cu pas:

...

1intreg 1/5m ......1 pereche de pantaloni

15×6/5=18 m......15 perechi de pantaloni

2 intregi 3/10=23/10m ........1 costum

8×23/10=184/10=18,4m.........8costume

18+ 18,4= 36,4m

54intregi 17/ 20= 1097/20=54/85 m stofă

54,85- 36 ,4=18,45 m stofă rămasă.

a) ( x+38/15)×3/2=21/4

x+38/15=21/4÷3/2

x+38/15=21/4×2/3

x+38/15=7/2

30x+76=105

30x=105-76

30x=29

x=29/30

b) 109/50÷y= 109/1000

109/50×1/y=109/1000

109/50y=109/1000

50y= (109×1000)/109

50y=109000/109

y= 1000/50

y= 20