How can I update a field in a MySQL database table by addition in MySQL database in a single query

Question

I have a table that stores a value that will be added to over time. When I want to add to the value I would like to do so in a single query rather than -

1. Get o

Answer 1

UPDATE table SET field = oldValue + X WHERE id = 1

Answer 2

UPDATE table SET value = value + x WHERE id = thisID