Răspunsuri

2014-11-10T19:59:25+02:00
2014-11-10T20:02:27+02:00
X + y = 12
x = 2y
2y + y = 12
3y = 12
y = 12 : 3
y = 4
x = 2 y
x = 2 x 4
x = 8