Question

Ex 13 va rog nu stiu cum se rezolva

Answer 1

t= tata
m= mama
f= fiica
t+m+f= 90
t, m, f=?

m= 3f
t= m+ 6=> t=3f+ 6
t+m+f= 90=> 3f+ 6+ 3f+ f= 90=> 7f+ 6=90=> 7f=90-6=> 7f=84=> f=84: 7=> f= 12
f=12=> m= 3x 12=> m= 36
m=36=> t= 36+ 6=> t= 42
F= 12
M= 36
T= 42