Respuesta :

Answer:

4x + 9x = 52

x = 4

Step-by-step explanation:

Let the unknown number be x

Given: Four times of that number ( 4x ) added to 9 times of that number ( 9x )

equals to 52

4x + 9x = 52

13x = 52

x = 4

So, the number is 4.

If this is correct, please give me brainliest.