The side lengths of a triangle are 5x−45x - 45x−4 mm, 2x+12x + 12x+1 mm and x+7x + 7x+7 mm.
Write down an expression, in terms of xxx, for the perimeter of the triangle.
The perimeter of the triangle is 52 mm. Work out the value of xxx.
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.