Question

determina x si y nr. naturale daca ,,a x .y=42 b x.(Y+3)=21 C X.(X+2)=24 D (X-3).(Y-5)=0

Answer 1

x•(x+2)=24; x=(24-2):2=11; x=11
(11-3)•(Y-5)=0; 8•(Y-5)=0; 8•Y-8•5=0; 8•Y-40=0; 40=8•Y; Y=40:8=5

Answer 2

x•(x+2)=24; x=(24-2):2=11; x=11
(11-3)•(Y-5)=0; 8•(Y-5)=0; 8•Y-8•5=0; 8•Y-40=0; 40=8•Y; Y=40:8=5