The unknown values in an equation could be the individual costs of a smoothie and a banana when the combined cost is known. Simultaneous equations can be useful when running a business.

A MECHANICAL calculating machine for solving simultaneous linear equations up to ten in number under construction at the Massachusetts Institute of Technology by Drs. V. Bush and J. B. Wilbur was ...

We’re suckers for good-looking old-school calculators, so this interesting numerical equation-solving calculator by ... equations and Newton-Raphson for simultaneous equations.