Question

Un motociclist parcurge 1 pe 2 dintr-un drum in prima zi, a doua zi parcurge 120 km. Calculati lungimea drumului.

Answer 1

120×2=240 ...............

Answer 2

$x \to lungimea \ drumului \\\\ \frac{1}{2} \ din \ x= \frac{1}{2}*x\to \frac{x}{2}-prima \ zi \\\\\\ x^{(2}-\frac{x}{2}=\frac{2x-x}{2} \to \frac{x}{2}-restul \\\\\\ \frac{x}{2}= 120 \\\\ x=2*120 \\\\ \boxed{x=240}$