Given data:
The given table.
The expression for the average temperature is,

Thus, the value of x is 86 degree Fahrenheit.
Answer:
B
Step-by-step explanation:
This is a neat question
f(x) - g(x) = 2x Add g(x) to both sides
f(x) = g(x) + 2x
Now you need the right hand side to have 20 added to g(x).
2x must = 20
2x = 20 Divide by 2
x = 20/2
x = 10
So the answer must be x = 10
We need more info or a pic
6 I think is one you can say