Courses · Mathematics

Algebra foundations: equations and formulas

Get sure-footed with the order of operations and negative numbers, solve linear equations, and rearrange formulas the way physics and programming need.

Level: Upper secondary and first-year university

  1. 1Order of operations and negative numbersWork out a sum in the right order: brackets, powers, × and ÷, then + and −. Add, subtract and multiply negative numbers.Free to read · 5 practice questions
  2. 2Solving linear equationsSolve an equation by doing the same thing to both sides. Expand brackets and gather the unknown on one side. Check an answer by putting it back into the equation.Members · 4 practice questions
  3. 3Rearranging formulasMake a different letter the subject of a formula. Put numbers into a formula and work out the unknown.Members · 4 practice questions

Textbook for this course

  • Algebra and Trigonometry 2e

    Jay Abramson and contributing authors. OpenStax, Rice University, 2021.

    Licence CC-BY-NC-SA-4.0, checked 2026-10-27. Source: openstax.org/details/books/algebra-and-trigonometry-2e. Its licence doesn’t allow a paid platform to show it, so WorldClass cites it.

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