Question

Heei!
Nu prea stiu această problemă:
X si y direct proporționale cu 3 si 4 . si y e mai mare cu 14 decât x
A ajută cineva ? ;))

Answer 1

$\{x;y \} \ \ \ d.p. \\ \{3;4 \} \\\\\\ \Longrightarrow \frac{x}{3}=\frac{y}{4}=k \\\\ x=3k \\ y=4k \\\\\\ y=x+14 \\\\ 4k=3k+14 \\\\ 4k-3k=14 \\\\ \underline{k=14} \\\\\\ x=3*14 \\\\ \boxed{x=42} \\\\ y=4*14 \\\\ \boxed{y=56}$