Răspunsuri

2014-11-17T19:41:15+02:00
2014-11-17T20:24:30+02:00
Creioane=a
caiete=b
 3a+6b=5750lei
4a+2b=3000lei
2b=3000- 4a
3a+3(3000- 4a)=5750
3a+9000-12a=5750
9a=9000-5750
9a=3250
a=3250:9
a=361lei creioane
4x361 +2b=3000
2b=3000-1444
2b=1556
b=778lei
Proba : 4x361+2x778=1444 + 1556=3000lei