Question

Determine o valor de x :

a) x/7 =3/21

b) 8/x = 12/3
​

Answer 1

Explicação passo-a-passo:

a

x/7= 3/21

multiplica em cruz

21 * x = 7 * 3

21x = 21

x =21/21 = 1 >>>>>>>resposta

b

8/x = 12/3

idem

12 * x = 8 * 3

12x = 24

x = 24/12 = 2 >>>>>>>resposta