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Edexcel IGCSE Math A 2.1.A That symbols may be used to represent numbers in

Practise reading letters as unknown numbers in equations and as variables in expressions or formulae before substituting or simplifying.

Syllabus
First assessment 2018
Course
Math A 4MA1
Level
Foundation

2.1.A Symbols in equations, expressions and formulae question 1

[Maximum number: 2]

Here is a number machine.

Figure for Question 2.1.A Symbols in equations, expressions and formulae question 1 — Edexcel IGCSE Math A Foundation

When the input is 7 the output is 60

Write down an expression, in terms of x, for the output.

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