The sizes of the angles, in degrees, of a triangle are 3x+103x + 103x+10, 2x−52x - 52x−5 and x+25x + 25x+25

Work out 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.