Respuesta :
Answer:
n equals 9
Step-by-step explanation:
Multiply everything by 3 to get n by itself. Now you have n + 21 = 30. Subtract 21 from both sides and now you have n = 9
Answer:
n equals 9
Step-by-step explanation:
Multiply everything by 3 to get n by itself. Now you have n + 21 = 30. Subtract 21 from both sides and now you have n = 9