Answer:
Your answer should be 13
Step-by-step explanation:
You were given 25, so you need to work backwards. First, multiply the 25 by 3 to get 75. Then Add 6, and you end with 81. Afterwards, subtract 3 from 81 to get 78, then divide by 6 to get 13.
I believe it's 13
Answer: The student could use large intervals (what he counts by)
6
3x-x+2=4