Question

problema:
a) 9 lei/kg---10kg
6 lei/kg----?kg
?lei/kg----18 kg

b)40 km/h---9h
60km/h---?h
?km/h---12h

c)30 saci---60kg/sac
? saci----45kg/sac
12 saci----?kg/sac

d)30 trepte--20 cm/treapta
? treapte -- 25 cm/treapta
15 trepte--?cm/treapta

Answer 1

2)9/6=x/10
x=9*10/6=15(kg)

x/9=10/18
x=9*10/18=5(lei)

b)40/60=x/9
x=40*9/60=6(h)
x/40=9/12
x=40*9/12=30

c)x/30=60/45
x=30*60/45=40

30/12=x/60
x=30*60/12=50

d)x/30=20/25
x=30*20/25=24

30/15=x/20
x=30*20/15=40

P.S linia / inseamna linia de fractie