Question

Aflati doua numere care au diferenta 3,69 si raportul 2 supra 5
Ofer coronita celui mai bun

Answer 1

b - a = 3,69
a/b = 2/5 => a = 2b/5

b-2b/5=3,69   |*5
5b-2b =18,45
3b=18,45
b=18,45/3
b=6,15
a=b-3,69
a=6,15-3,69
a=2,46

Answer 2

a-b=3,69
a/b=2/5 → 5a=2b→ a=2b/5
2b/5-b=3,69
(2b-5b)/5=369/100
-3b/5=369/100
-3b=369/100 · 5
-3b=369/20
b=369/20 :(-3)=-123/20=-6,15

a-(-6,15)=3,69
a+6,15=3,69
a=3,69-6,15=-2,46