Need help with my calculator! I have a Casio fx-CG50 but the equation solver on it is kind of wonky. It gives me the wrong answer, until I input another different equation
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![How to solve Polynomial and Simultaneous Equation on Casio fx-991ES Plus 2nd Edition [2020] - YouTube](https://i.ytimg.com/vi/ye055nDpw9o/hqdefault.jpg "How to solve Polynomial and Simultaneous Equation on Casio fx-991ES Plus 2nd Edition [2020] - YouTube")