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

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