Respuesta :
Answer:
15
Step-by-step explanation:
Pretend a is the number.
We have: 31 + 3a = 76
=> 3a = 76 - 31 = 45
=> a = 45/3
=> a = 15
Answer:
15
Step-by-step explanation:
Pretend a is the number.
We have: 31 + 3a = 76
=> 3a = 76 - 31 = 45
=> a = 45/3
=> a = 15