Respuesta :
Answer: 15
Step-by-step explanation:
Add 5 to 40, you get 45, then divide 45 by 3, you get a result of 15
Answer:
x = 15
Step-by-step explanation:
let the mystery number be x
40 = 3x-5
add 5 to each side
45 = 3x
divide each side by 3
15 = x