Respuesta :
I am assuming that you want verification.
Yes. If u = 10, x = 15.
x + 10 = 25
x + (10 - 10) = 25 - 10
x = 15
Yes. If u = 10, x = 15.
x + 10 = 25
x + (10 - 10) = 25 - 10
x = 15