Răspunsuri

2013-12-15T15:35:41+02:00
A+b=65 <=> a=65-b
3a-b/2=48 <=> 6a-b=48
6(65-b)-b=48 <=> 325-6b-b=48 <=> -7b=-304 <=>  b=304/7
inlocuiesti in prima relatie si a= -17/5
2 4 2