Question

Dacă, $\frac{x}{y} = \frac{2}{5}$

$\frac{2x + 5y}{3x + 8y} =$ ?​

Answer 1

$\frac{x}{y}=\frac{2}{5} => x = 2k, y = 5k\\\frac{2x+5y}{3x+8y} = \frac{2 \cdot 2k + 5 \cdot 5k}{3 \cdot 2k + 8 \cdot 5k} = \frac{29k}{46k} = \frac{29}{46}$