I AM much obliged to Herr Sattler for the information which he has been kind enough to give in regard to my article in NATURE of October 29, 1908, and also for sending me the paper by Prof. Heymann ...

An equation is a mathematical expression that contains an equals symbol. Equations often contain algebra. Algebra is used in Maths when we do not know the exact number in a calculation - this unknown ...

Removing brackets is to multiply the term outside the brackets by each term inside - also known as the distributive law. Use FOIL to remove a pair of brackets then simplify by collecting like terms.

A basic algebra equation has left people divided over the correct process for solving it, with two methods resulting in two completely different answers. The debate around the problem hinges on the ...