Respuesta :

rajatakeshisimla

Step-by-step explanation:

はい、両側を削除して、3を掛けて7にします

marcthemathtutor

Step-by-step explanation:

Given:

3n = 21

if we multiply both sides by 1/3, we will get:

3n = 21

3n x (1/3)= 21 x (1/3)

3n/3 = 21/3

n = 21/3

n = 7

Hence we can indeed solve for n by multiplying both sides by (1/3)