Question

La o librarie s-au adus culegerii de matematica si culegerii de fizica. Numarul culegerilor de fizica reprezinta 9pe11 din numarul culegerilor de matematica Cate Culegerii de fiecare fel s-au adus daca cele de fizica sunt cu 64 mai putine decat cele de matematica

Answer 1

$f= \frac{9}{11} m \\ f=m-64 \\ m-64= \frac{9}{11} m-amplificam \\ 11m-704=9m \\ 11m-9m=704 \\ m=704:2=\ \textgreater \ m=352.culegeri.matem \\ f= \frac{9}{11} 352=\ \textgreater \ f=288.culegeri.fizica$

Answer 2

c.m  /--------/--------/--------/---------/---------/--------/--------/--------/--------/--------/--------/
c.f   /--------/--------/---------/---------/---------/--------/--------/--------/--------/
64:2=32
c.m=32x11
c.m=352
c.f=32x9
c.f=288
352-288=64