Question

Daca 20% dintr-un nr este 144 aflati x?????

Answer 1

$\displaystyle \frac{20}{100} \cdot x=144 \\ \frac{20x}{100} =144 \\ 20x=144 \cdot 100 \\ 20x=14400 \\ x= \frac{14400}{20} \\ x=720$