Respuesta :
Answer:
9x
Step-by-step explanation:
because they're like terms add them together
3x + 6x = 3 + 6 =
9x, could i have brainliest if possible thanks!
9x. Simply add the 3 and 6. You can do that because they both have the same variable. You have 3 x’s and 6 x’s, so you’ll have 9 x’s.