To solve for x, we need to isolate it on one side of the equation.

First, we can simplify the right side of the equation by adding 5839 and 8591:

5839 + 8591 = 14430

Now, our equation becomes:

7x + 18 = 14430

To isolate x, we need to subtract 18 from both sides:

7x = 14412

Finally, we can solve for x by dividing both sides by 7:

x = 2058

Therefore, the solution to the equation is x = 2058.