equate

v. (-ting) 1 (usu. Foll. By to, with) regard as equal or equivalent. 2 (foll. By with) be equal or equivalent to.  equatable adj. [latin aequo aequat-: related to *equal]

v. t. To make equal; to reduce to an average; to make such an allowance or correction in as will reduce to a common standard of comparison; to reduce to mean time or motion; as, to equate payments; to equate lines of railroad for grades or curves; equated distances.