Răspunsuri

2014-11-04T19:50:25+02:00
5c.............3p.......19lei/*2
3c.............6p........24lei


10c..........6p.........38lei
3c............6p.........24lei

7c...........0p........14lei
7c=14lei
1c=14:7=2

inlocuim acum:
5creioane  *2lei=10lei
19lei-10lei=9lei
deci 3pixuri costa 9 lei
9:3=3lei un pix
2014-11-04T19:52:00+02:00
5 c + 3 p = 19
3 c + 6 p = 24
inmultim prima ecuatie cu 2
10 c + 6 p = 38
 3 c + 6 p = 24, le scadem
__________________________
7 c     /     = 14
c = 14 : 7
c = 2 lei
3 * 2 + 6 p = 24
6 p = 24 - 6
6 p = 18
p = 18 : 6
p = 3 lei