Answer:
2 <= x < 8
Step-by-step explanation:
2 is less than or equal to x and the symbol for that is <=
the least number should also be on the left side
8 is greater than x so the symbol is <
8 is the biggest number and goes on the right
Answer:

Step-by-step explanation:
Assuming We want to evaluate

When y=6 and z=3.
We substitute to get:

We multiply to get:

We simplify the denominator to get:

Reduce the first fraction:

Add the numerator and keep one denominator for they are like fractions

Write as a mixed number:

The answer should be 1/3=12-n
Both are the same because the first line is going by ×2 so the missing number would be 22. The second line is going by +1 so 21+1=22. (Hope this will prove your friend wrong :3)