simultaneous equations

noun

(used with a plural verb)

1. a set of two or more equations, each containing two or more variables whose values can simultaneously satisfy both or all the equations in the set, the number of variables being equal to or less than the number of equations in the set.

simultaneous equations

plural noun

1. a set of equations that are all satisfied by the same values of the variables

Word History and Origins

Origin of simultaneous equations¹

First recorded in 1835–45