Respuesta :

Answer:

3

Step-by-step explanation:

3x - ( x - 4 ) = 3x + 1

3x - x + 4 = 3x + 1

2x + 4 = 3x + 1

3x - 2x = 4 - 1

x = 3

Hope it will help :)

Answer: 3

Step-by-step explanation:

3x - x + 4=3x+ 1

x = 4 - 1 = 3.