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2014-08-20T14:34:10+03:00
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
1 5 1
2014-08-20T14:34:37+03:00
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