Răspunsuri

2014-10-06T15:16:12+03:00
Aduni relatiile intre ele..
albi+cafenii=250
cafenii+cenusii=201
albi+cenusii=289
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2x(albi+cafenii+cenusii)=740 => albi+cafenii+cenusii=370
apoi incepi sa scazi..
albi+cafenii+cenusii-(albi+cafenii)=370-250 <=> cenusii=120
albi+cafenii+cenusii-(cafenii+cenusii)=370-201 <=> albi=169
albi+cafenii+cenusii-(albi+cenusii)=370-289 <=> cafenii=81
120+169+81=370.







2014-10-06T15:16:36+03:00
A+ca=250
ca+ce=201
a+ce=289
Scadem primele doua relatii: (a+ca)-(ca+ce)=a-ce=250-201=49
a-ce=49
a+ce=289
Adunam si ne da: 2a=289+49=338=>a=338/2=169
ca=250-169=81
ce=289-169=120