Bag P is five times as heavy as Bag Q. Bag P is 20g heavier than Bag R. The sum of the weights of the three bags is 640g.
Find the ratio of the weight of Bag Q to Bag P to Bag R.
71 exam-style questions on Edexcel GCSE Maths Forming and Solving Equations. Each one has a worked solution and a mark scheme showing where the marks go.