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![How to Solve a System of Three Equations Using Matrix on Casio Classwiz [SAT, A Level, IGCSE 2020] - YouTube](https://i.ytimg.com/vi/ji_7AHAAF7g/hqdefault.jpg "How to Solve a System of Three Equations Using Matrix on Casio Classwiz [SAT, A Level, IGCSE 2020] - YouTube")