The diagram shows a parallelogram EFGHEFGHEFGH. The top side EF EF\,EF has a length of 8x−128x - 128x−12. The bottom side HG HG\,HG has a length of 5x+35x + 35x+3. All measurements are in centimetres.

The perpendicular height of the parallelogram is 4 cm.
Find the area of EFGHEFGHEFGH.
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.