Respuesta :
The answer is 12x because just add the three numbers and plug in x at the end of the answer
Question
3x + 4x + 5x =
Answer:
Step-by-step explanation:
sum the numbers and multiply for x,
3x + 4x + 5x =
12x
or
3x + 4x + 5x =
(3 + 4 + 5)x =
12x