Răspunsuri

2014-10-26T19:14:56+02:00
Adunam toate relatiile:
2a+2b+2c=1200
a+b+c=600
c=300
a=100
b=800
iarta-ma dar nu inteleg...de unde deriva...300...100 ..800
scazi din a+b+c pe a+b si vine 600-300=300
pupicei si multumiri
2014-10-26T19:28:38+02:00
A+b=300
b+c=500
a+c=400
2a+2b+2c=1200
2(a+b+c)=1200
a+b+c=1200:2=600

a+b+c=600
a+b=300
c=600-300
c=300
b+c=500
b+300=500
b=500-300
b=200
a+c=400
a+300=400
a=400-300
a=100

a+b=100+200=300;b+c=200+300=500;a+c=100+300=400
pupici multi si sanatate
mersi
si tie