Răspunsuri

2014-11-03T20:16:07+02:00
A-2b=17 =>a=2b+17
Inlocuim si ne da 2b+17+b+3c=53 =>3b+3c=53-17=>3b+3c=36
Dam factor comun pe 3
3x(b+c)=36=>b+c=36:3=>b+c=12
Inlocuim in a+b+3c=53 si ne da a+2c+12=53=>a+2c=53-12=>a+2c=41
8 4 8