Question

x/7 = 9/21 o valor de x prfvr

Answer 1

x/7=9/21 ⇒ x=7.9/21 ⇒ x=63/21 ⇒ x=3

Answer 2

Resolução:

$\frac{x}{7}$ = $\frac{9}{21}$

21x=9*7
21x=63
x=63/21
x= 3