1. x-y=132
x : y = cat 5 si rest 12 ---> 5 * y + 12=x . Inlocuim x in prima ec.
5y+12-y=132
4y = 120
y = 30 ---> x=162
2. a+b+c=312
a=b/2 - 9
b=c/3 - 8 ---> b+8=c/3 ---> c=3b+24
Inlocuim in prima ecuatie pe a si c :
b/2-9 + b + 3b+24=312
b/2 + b + 3b =312-24+9
4b+b/2 = 297 (inmultim totul cu 2)
8b +b = 594
9b =594 --> b= 66
a=33-9=24
c=3*66+24=198+24=222
