Question

determinati x si y daca x/y=5/3 si x+y=16​

Answer 1

$\frac{x}{y} = \frac{5}{3} \\ 3x = 5y \\ x = \frac{5y}{3}$

Si inlocuim in sumă:

$\frac{5y}{3} + y = 16$

Aducem la acelasi numitor inmultind y cu 3, si ajungem la:

$\frac{5y + 3y}{3} = 16 \\ 8y = 48 \\ y = \frac{48}{8} \\ y = 6$