Respuesta :
Answer:
12x-5
Step-by-step explanation:
3x and 9x are like terms, and so are 2 - 7. You can identify like terms as they most likely end the same. When you have your like terms identified, just add them like normal.
3x + 9x = 12x
2 - 7 = -5
12x-5
Answer:
Step-by-step explanation:
3x+2+9x-7 = 12x-5
First, collect like terms which is 12x+2-7. Then, calculate the difference which is 12x-5.
