**Usage examples **"equation":

- With the beauty of the trees, the grass, the flowers, the vines, and all things natural, it possessed the added attractiveness of a certain personal equation. - "The Girl at Cobhurst", Frank Richard Stockton.
- And to be taken into the magic circle was to be given freely of that personal equation which made his plays so personal. - "Representative Plays by American Dramatists: 1856-1911: The Moth and the Flame", Clyde Fitch.
- Is equation of exchange realistic? - "The Value of Money", Benjamin M. Anderson, Jr..