Răspunsuri

2014-11-11T17:07:38+02:00
3 l + 5 c = 34
9 l + 4 c = 47
inmultim prima ecuatie cu 3
9 l + 15 c = 102
9 l + 4 c =  47,  le scadem
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    / + 11 c = 55
c = 55 : 11
c = 5 lei
3 l + 5 * 5 = 34
3 l = 34 - 25
3 l = 9
l = 9 : 3
l = 3
3 4 3