Equations
Overview
An equation is a statement that two things are equal, and solving one means finding the value (or values) that make it true. From a single linear equation to a pair of simultaneous equations, the skill of keeping an equation balanced is one of the most powerful in mathematics.
In this lesson you will construct and solve linear equations, solve a pair of simultaneous linear equations, and change the subject of a formula. (At Extended these skills extend to fractional, simultaneous non-linear and quadratic equations.)
Objectives
- Construct simple expressions, equations and formulas.
- Solve linear equations in one unknown.
- Solve simultaneous linear equations in two unknowns.
- Change the subject of simple formulas.
- Construct expressions, equations and formulas. (Extended only)
- Solve fractional equations with numerical and linear algebraic denominators. (Extended only)
- Solve simultaneous equations, involving one linear and one non-linear. (Extended only)
- Solve quadratic equations by factorisation, completing the square and by use of the quadratic formula. (Extended only)
- Change the subject of formulas. (Extended only)
Lesson Note
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Lesson Evaluation
Congratulations on completing the lesson on Equations. Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.
You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.
Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.
- Solve 3x + 5 = 20. A. x = 3 B. x = 5 C. x = 8 D. x = 15 Answer: B
- Solve 2(x - 3) = 10. A. x = 2 B. x = 5 C. x = 8 D. x = 11 Answer: C
- Solve the simultaneous equations x + y = 7 and x - y = 1. What is x? A. 3 B. 4 C. 6 D. 8 Answer: B
- Make a the subject of v = u + at. A. a = v - u - t B. a = (v - u)/t C. a = v - u/t D. a = (u - v)/t Answer: B
- Solve 5x - 4 = 11. A. x = 1.4 B. x = 3 C. x = 7 D. x = 15 Answer: B
Available on the Green Bridge App
Download the Green Bridge CBT app on your phone or computer to access full lesson notes, practice questions, and more.
Available on the Green Bridge App
Download the Green Bridge CBT app on your phone or computer to access full lesson notes, practice questions, and more.
Recommended Books
Practice Mock Questions
Want to practice mock questions on Equations? Download the Green Bridge CBT app to access mock questions and full practice assessments for this topic.
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