Question

Ayudenmee

25-y = 2y+ 13 (y=12)

Answer 1

25-y = 2y+ 13 
- y - 2y = 13 - 25
     -3y = -12
        y = - 12 : (-3)
        y = 4
verificamos
25 - 4 = 2 *4 + 13
      21 = 21

saludos