8+2x is the answer. The rest of these characters is for the >20 rule
Answer: D
Step-by-step explanation:

175 students walk to school. 7+5=12 and 420 divided by 12 is 35. I checked how I did it was correct because of 5*35+7*35=420. Then I found the product of 5*35 which is 175.
The answer is 24 grams > 1.679 grams
Hope this helps <3