Lucy is three times as old as Alex. Lucy is 7 years older than Megan. The sum of their ages is 126.
Find the ratio of Alex's age to Lucy's age to Megan's age.
Practise Edexcel GCSE Maths Forming and Solving Equations with exam-style questions for Foundation and Higher tier. 78 questions, matched to the Edexcel GCSE Maths (1MA1) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.