Respuesta :

Answer:

5

Step-by-step explanation:

13u - 8u = 25

5u = 25

u = 5

Answer:

u = 5

Step-by-step explanation:

13u - 8u = 25

combine 13u and 8u to get 5u.

5u = 25

divide each side by 5

5u/5 = 25 /5

u = 5