Question

afla numerele naturale x,y daca

x*y= 7
x*(y+2)=11
(x+2)*(y+1)=

Answer 1

x×y=7

x×(y+2)=x×y+x×2=7+2x=11

2x=11-7

2x=4

x=4:2

x=2

x×y=7

x=2

y=7:2

y=3,5

Răspuns :

x=2 și y=3,5

Verificare :

x×y=3,5×2=7

x×(y+2)=2×(3,5+2)=2×5,5=11

(x+2)×(y+1)=(2+2)×(3,5+1)=

=4×4,5=18