Question

Produsul a doua nr este 5430. Daca micșorăm primul factor cu 100, produsul devine4430. Afla cele doua nr?

Answer 1

Fie a,b cele doua numere.
a*b=5430
(a-100)*b=4430
a*b-100*b=4430
5430-100*b=4430
100*b=5430-4430
100*b=1000
b=1000:100
b=10.
10*a=5430
a=5430-10
a=543

Raspuns:a=543, b=10.

SUCCES

Answer 2

x•y=5430
(x-100)•y=4430
x=?
y=?
xy-100y=4430
100y=xy-4430
100y=5430-4430
100y=1000
=>y=10
x•10=5430
=>x=543
V:543•10=5430
443•10=4430