Răspuns :
t+f=78
t/f=2,25= 2 intregi 25/100= 2 intregi 1/4= 9/4
t/f=9/4
t/9=f/4=k
t=9k
f=4k
9k+4k=78
13k=78
k=6
t=6*9=54 ani are tatal
f=4*6=24 ani are fiul
t/f=2,25= 2 intregi 25/100= 2 intregi 1/4= 9/4
t/f=9/4
t/9=f/4=k
t=9k
f=4k
9k+4k=78
13k=78
k=6
t=6*9=54 ani are tatal
f=4*6=24 ani are fiul
a+b=78} => a=78-b
a÷b=2,25} => 78-b÷b=2,25=2,25b=78-b=3,25b=78
b=24
a=78-24=54
a÷b=2,25} => 78-b÷b=2,25=2,25b=78-b=3,25b=78
b=24
a=78-24=54