# Equation

## Contents

## Key Stage 3

### Meaning

An equation is any mathematical expression with an 'equals' sign.

### About Equations

- Equations are used to find unknown quantities.

## Key Stage 4

### Meaning

An equation is any mathematical expression with an 'equals' sign.

### About Equations

- Equations are used to find unknown quantities.

### References

#### AQA

*Equations, page 301, GCSE Combined Science Trilogy; Biology, CGP, AQA**Equations, page 380, GCSE Biology, CGP, AQA**Equations, pages 265-267, 292, GCSE Physics; Third Edition, Oxford University Press, AQA*

#### Edexcel

*Equations (chemical), pages 12, 13, GCSE Chemistry; The Revision Guide, CGP, Edexcel**Equations (chemical), pages 22-27, 88-90, GCSE Chemistry, CGP, Edexcel**Equations (chemical), pages 75, 76, GCSE Combined Science; The Revision Guide, CGP, Edexcel**Equations, page 328, GCSE Biology, CGP, Edexcel**Equations; balanced, page 205, GCSE Combined Science, Pearson Edexcel**Equations; balanced, page 61, GCSE Chemistry, Pearson, Edexcel**Equations; half equations, pages 210, 225, 231, GCSE Combined Science, Pearson Edexcel**Equations; half equations, pages 66, 81, 87, GCSE Chemistry, Pearson, Edexcel**Equations; ionic, page 210, GCSE Combined Science, Pearson Edexcel**Equations; ionic, page 66, GCSE Chemistry, Pearson, Edexcel*

#### OCR

*Equations, pages 109, 110, Gateway GCSE Combined Science; The Revision Guide, CGP, OCR**Equations, pages 289-291, Gateway GCSE Biology, Oxford, OCR**Equations, pages 9, 36, 37, Gateway GCSE Chemistry; The Revision Guide, CGP, OCR**Equations, pages 92-95, 300, 301, 303, Gateway GCSE Chemistry, Oxford, OCR**Equations; Changing subject of, pages 284-285, Gateway GCSE Physics, Oxford, OCR**Equations; Graphs, pages 288-291, Gateway GCSE Physics, Oxford, OCR**Equations; Of motion, pages 58, Gateway GCSE Physics, Oxford, OCR**Equations; Units in, pages 29, 286, Gateway GCSE Physics, Oxford, OCR*