Edexcel IGCSE Math A 2.3.F Changing the Subject of a Formula
Practise reversing operations so a variable appearing once becomes the subject of a linear or fractional formula.
- Syllabus
- First assessment 2018
- Course
- Math A 4MA1
- Level
- Foundation
Exam points
- undo addition or subtraction before reversing multiplication or division
- clear a fraction first when the required subject appears in its numerator
- present the named variable alone on one side and check by substituting values
2.3.F Changing the subject of a formula question 1
[Maximum number: 2]
Make t the subject of m=5t+4
5m=t+4
Final answer:
t=5m-4
Equivalent answers include t=5(m−54) or t=-4+5m.
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