Respuesta :

1) 3 = -2x + 25
3-25 = -2x
-22 = -2x
11 = x
2) 2x + 1 = x + 5
2x - x = 5 - 1
x = 4
3) 4x = 2x + 6
4x - 2x = 6
2x = 6
x = 6/2
x = 3