Lemmara logoLemmaraWorked solution

4MA1/2F Jun 2025, Question 12: Constructing Equations

Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2F (Foundation) · Calculator · 5 marks

اقرأ هذا الحل مشروحاً بالعربي ←

The question, in short

Rearrange an equation to isolate y, then form an expression for the total number of crayons T bought from b boxes of 12 and p packets of 3.

Summarised in our own words. Use the official paper for the exact wording and any diagrams.

Part (a) · 2 marks

Rearrange w = 3y − d so that y is expressed in terms of w and d.

  1. 1w = 3y − d
  2. 2Add d to both sides: w + d = 3y
  3. 3Divide by 3: y = (w + d)/3

Answery = (w + d)/3

Part (b) · 3 marks

Using 12 crayons per box and 3 per packet, write T as a formula involving b and p.

  1. 1b boxes of 12 crayons: 12b
  2. 2p packets of 3 crayons: 3p
  3. 3T = 12b + 3p

AnswerT = 12b + 3p

Stuck on a step? Read the free lesson: Constructing Equations

Practise more constructing equations questions

Real 4MA1 past-paper questions, marked on your working like the exam, with a worked solution for every part.

Practise free on Lemmara

More past-paper questions on constructing equations

Also searched as: 4MA1 2F June 2025 · 4MA1/2F · 4ma1 jun25 2f · question 12.
Lemmara is an independent study tool, not affiliated with or endorsed by Pearson Edexcel. The worked solutions are Lemmara’s own.