11) 12 stilouri.........420lei
x.................595lei
x=(595*12):420=17 stilouri
12) 36m............15costume
x ...............24costume
x=(36*24)/15=57.6 m
13)90lei .............5 luni
x .................12luni=1an
x=(90*12)/5= 216lei
14) 8zile........520lei
21 zile ......x
x=(21*520)/8= 1365 lei
15) 3 tone= 3000kg
200kg sfecla...........25kg zahar
x ..........................3000kg zahar
x=(3000*200)/25=24000kg sfecla= 24 tone sfecla
