Algebra and geometry : Solving linear equations involving angles and triangles

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Solving an equation given a triangle and angles at a point in terms of x.
Essential algebra and geometry revision
AQA GCSE Maths 2013 summer exam solution
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It presents interesting teaching dynamics

ryanweaver
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Content and context texts transcending… but the application of systemic change management…
Flows can’t stop.

ryanweaver
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I don't get it. How did he find the 360? The answer in my calculator is not the same to his answer.

andreiibarra
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Still doesn't make sense, how does he get the values 2X and 5x and 80?

gileshill