Edexcel IGCSE Math A 2.4.A Linear Equations in One Unknown
Practise solving linear equations with integer or fractional coefficients and unknowns on one or both sides.
- Syllabus
- First assessment 2018
- Course
- Math A 4MA1
- Level
- Higher
Exam points
- expand brackets and collect all unknown terms on one side
- clear fractional coefficients using a common multiple before rearranging
- show equivalent algebraic steps and verify fractional or decimal solutions by substitution
2.4.A Solving linear equations question 1
[Maximum number: 3]
Solve 5(4-x)=7-3 x
Show clear algebraic working.
x=
20-5x=7-3x
Example:
20-7=-3x+5x
OR
-5x+3x=7-20
Final answer:
x=6.5
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Marking guidance:
- M1 for expansion of the bracket
- M1 ft from a four-term equation for isolating x terms and numbers
- A1 dep on M1 awarded and correct working
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