Question

alina,stefan si cei doi parinti au impreuna 82 ani..peste 3 ani mama va avea de 4 ori varsta lui stefan,iar tatal de 6 ori varsta alinei.cati ani are fiecare,daca stefan are cu 2 ani mai mult decat alina?

Answer 1

a+s+t+m=82
a+3+s+3+t+3+m+3=82+3+3+3+3
m+3=(s+3)×4
t+3=(a+3)×6
s=a+2
m+3=(a+2+3)×4
a+3+a+2+3+(a+3)×6+(a+2+3)×4=82+12
a+3+a+5+6a+18+4a+20=94
12a=94-3-5-18-20
12a=48
a=48÷12
a=4
s=4+2=6
m+3=(6+3)×4
m+3=36
m=36-3
m=33
t+3=(4+3)×6
t+3=42
t=42-3
t=39