An equation is a mathematical statement showing that two expressions are equal. The two expressions are linked with an equals symbol (=). The unknown variable (often the letter \(x\)) can take any ...

Some equations have letters on each side of the equals sign, for example: \(4(k + 7) = 12k - 4\) Solve this equation by rearranging all the letters onto one side of the equation and all numbers onto ...

Before diving into the mixed practice itself, let's solidify the fundamentals. A variable is a symbol, usually a letter, that represents an unknown value. An expression is a combination of variables, ...

Grade school math students are likely familiar with teachers admonishing them not to just guess the answer to a problem. But a new proof establishes that, in fact, the right kind of guessing is ...