Răspuns :
[tex] x/y = 2/7; y-x = 50 \\ \\ x/2 = y/7 = (y-x) / (7-2) = 50/5 = 10 \\ \\ x = 2*10 = 20; y = 7*10=70 \\ \\ x *y = 20*70 = 1400[/tex]
stiim ca x/y = 2/7 si y-x = 50 (unde x < y )
⇒ x/2 = y/7 = (y-x) / (7-2) = 50/5 = 10
(am folosit proprietatile sirurilor de rapoarte egale ... )
⇒ x = 2*10 = 20 si
y = 7*10 = 70
⇒ x * y = 20*70 = 1400 .
Proba: x/y = 20/70 = 2/7 si
y-x =70-20 = 50 (A)
⇒ x/2 = y/7 = (y-x) / (7-2) = 50/5 = 10
(am folosit proprietatile sirurilor de rapoarte egale ... )
⇒ x = 2*10 = 20 si
y = 7*10 = 70
⇒ x * y = 20*70 = 1400 .
Proba: x/y = 20/70 = 2/7 si
y-x =70-20 = 50 (A)