3rd level Solve linear equations Using an equation to solve a word problem. An equation is a mathematical expression that features an equals sign. Solving an equation means finding a missing value ...

Chemical reactions can be represented by word equations. Learn more in this KS3 Chemistry guide from Bitesize.

Related: 9 equations that changed the world It is a singular skill to think symbolically, as this long history shows. Take the word problem I gave above: it is an example of algorithmic thinking.