A rectangular tile has a length of (2x+1)(2x + 1)(2x+1) cm and a width of (x+4)(x + 4)(x+4) cm.
Find an expression for the perimeter of the tile.
Given the tile has a perimeter of 40 cm, find the value of xxx.
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.