Noun
a polynomial equation of the first degree
Source: WordNetIf the son's age was made known, then there would no longer be two unknowns (variables), and the problem becomes a linear equation with just one variable, that can be solved as described above. Source: Internet
This linear equation is much easier to solve than the full potential equation: it may be recast into Laplace's equation by a simple coordinate stretching in the x-direction. Source: Internet
Finding publisher codes for English and German, say, with this effect amounts to solving a linear equation in modular arithmetic. Source: Internet