Question

6÷×=9÷12 blhhhjiggghj

Answer 1

6    9
x    12
Regra de 3:
9x = 6 . 12
9x = 72
x= 8

Answer 2

    6/x = 9/12 ---multiplica cruzado
    9x = 12 . 6
    9x = 72
      x = 72/9 
      x = 8

Verificando:
                     6/8 = 9/12 ----simplificando
                     3/4 = 3/4