GCSE Maths: Algebra: Solving linear equations given angles inside a quadrilateral

The angles of a parallelogram are given by 2x, 3x-15 and 2x+24 Using the fact that the angles add to 360 degrees, we can set up and solve an equation in terms of x This lets us use algebra to solve the linear equations View my channel: http://www.youtube.com/jayates79