2) [(a-12)x3]+65=89
(a-12)x3=89-65
3a-36=24
3a=24+36
a=60:3
a=20
3) t+m+f=96
t=m+8
f=m-20
m+8+m+m-20=96
3m=96-8+20
m=108:3
m=36 ani are mama
t=36+8
t=44 ani are tata
f=36-20
f=16 ani are fiul
1) a+b+c=2011
a=b+476
b=c+304=>c=b-304
b+476+b+b-304=2011
3b=2011-476+304
b=1839:3
b=613
a=613+476=1089
c=613-304=309
la problema 1 mi-am permis sa deduc partea lipsa(nescrisa) a problemei