Question

What is the value of the expression 6n when n=7

Answer 1

You have to substitute the variable. A number next to a variable means to multiply.
6n
6 times 7
42
Hope this helps.

Answer 2

6n = 6 x n

n = 7

6 x 7 = 42

Therefore the answer is 42

Hope this helps

-AaronWiseIsBae