Place 7-n on the line

[Guest]

It says 'Considering that the numbers 1 and n are in the right place. Place the number 7-n on the line.'

My conclusion is that 'n' is 3, so '7-n' should be placed after this number because 7-n equals 4. Am I right?

[Guest]

Yes, you are right!
n = 3
So 7 - n = 4