Having difficulty solving this word problem

Question

if the difference if a number and seven is tripled, the result is nine more than the number. Find the number. Round your answer to the nearest integer.

Answer 1

difference of a number and 7

n - 7

is tripled

3(n - 7)

is

=

nine more than the number

n + 9

3(n - 7) = n + 9