Question

un ck de bomboane coasta31,2 lei cit vor costa 2,5kg de astfel de bomboane

Answer 1

$1kg.......31,2 lei \\ 2,5kg.......x \\\\\\ x=\frac{2,5*31,2}{1} \\\\ \boxed{x=78 \ lei}$

Answer 2

simplu   .............
2,5x31,2=78