Question

28/x = 21/7
Aflati x

Answer 1

21x=7*28
x=196/21 (simplificam prin 7)
x=28/3

Answer 2

$\frac{28}{x} = \frac{21}{7} \\ 28x=3 \\ x= \frac{28}{3} \\ \boxed{x=9,(3)}$