Question

Daca alice ii da lui susan 6 € atunci ... help me!

Answer 1

Notăm:

a - suma pe care o are Alice;

s - suma pe care o are Susan.

$\it \dfrac{a-6}{s+6}=\dfrac{2}{1} \Rightarrow a-6=2s+12|_{+6} \Rightarrow a=2s+18\ \ \ \ \ \ (1)\\ \\ \\ \dfrac{s-1}{a+1}=\dfrac{1}{3} \Rightarrow a+1=3s-3|_{-1} \Rightarrow a=3s-4\ \ \ \ \ \ \ \ (2)\\ \\ \\ (1),\ (2) \Rightarrow 3s-4=2s+18 \Rightarrow 3s-2s=18+4 \Rightarrow s=22\ \ \ \ \ (3)$

$\it (2),\ (3) \Rightarrow a=3\cdot22-4=66-4=62$

Deci, Alice are 62€ , iar Susan are 22€