Question

Aflati numerele a si b stiind ca sunt d.p. cu 2 si 5 si ca:
3a+4b=520

Answer 1

a=2k
b=5k

3a+4b=520
3*2k+4*5k=520
6k+20k=520
26k=520
k=20

a=2*20 = 40
b=5*20=100

Answer 2

{a,b}d.p. {2,5} a/2 = b/5 =K a=2k b=5k 3a+4b=250 3•2+4•5=520 6k+20k=520 26k=520=>K =20 a=2k•20=40 b=5k•20=100 Mult succes!!!!!