Equation Solve for X - fx-991EX - Casio Calculator Tutorials

Solving equations for variable X is possible with the equation solver in the fx-991ES PLUS calculator. Once the equation has been entered, the calculator uses Newton-Raphson numerical method to solve the equation.

After solving a equation with one unknown on 'Calc' mode in Casio fx 991ex (using shift+calc), the equation that just have been entered disappears after doing another calculation. Is there any way

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