Respuesta :
Answer:
-8
Step-by-step explanation:
3( x + 4 ) = 3 x + 4 = 3 x + 4
3 x + 12 = 3 x + 4
3x + 12=3x + 4
3x + 12-12 = 3x + 4-12
3x= 3x-8

Answer:
-8
Step-by-step explanation:
3( x + 4 ) = 3 x + 4 = 3 x + 4
3 x + 12 = 3 x + 4
3x + 12=3x + 4
3x + 12-12 = 3x + 4-12
3x= 3x-8