Question

La doua magazine s-au adus 432 kg de zahar.Cantitatea adusa la primul magazin reprezinta 4/15 din cantitatea adusa la al doilea magazin. Cite kg de zahar s-au adus la fiecare magazin?

Answer 1

Fie a si b cele doua magazine.
a=4/15*b
a+b=432, deci 4/15*b+b=432
Dam factor comun b si rezulta
b(4/15+1)=432
19/15 b=432
b=432:19/15=432:1,26=342,85
a=4/15*b=0,26*342,85=91,42
Deci a=91,42, b= 342,85