Multi step equation
Walt bought a new unique guitar (strings included) and an additional set of strings because he plays hard a tends to snap them often. In the middle of his guitar solo, you could hear 3 strings snap over the sound of his voice yelling, "I wanna rock!" Walt's new guitar was not a typical 6 string guitar, in fact, when his strings snapped he was only left with 2/3 of the original strings.
He replaced the broken strings and cranked up the song "Free Bird" by Lynard Skynard on his airpods to get ready for his next jam.
Walt has another older unusual guitar that has 7 less than twice the number of string on his new guitar (Walt is an unusual guy and collects unusual guitars). How many strings are on each of Walt's wild guitars if the total number of strings on the two guitars is 1953 less than the year was Free Bird released?