Question

Aflati doua numere care au dublul sumei 1 i jumatatea diferentei lor de 0.8(3).

Answer 1

2*(a+b)=1=>a=1/2-b
(a-b)/2=0.8(3) 

Inlocuim in cea de-a doua ec. a-ul si obtinem
1/2-2b=2*0.8(3) =>b=-0.583 =>a=1/2+0.583=1.083