Can the Casio fx-991ES PLUS Solve Equations with 4 Variables or Display Graphs?

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The Casio fx-991ES PLUS cannot solve equations with four variables as it lacks a 4x4 matrix function. It can solve equations in equation mode, but only for up to three variables. Additionally, the calculator does not have graphing capabilities, limiting its ability to display graphs. While it features a dot matrix display for viewing equations, it does not support advanced graphing functions. Overall, the Casio fx-991ES PLUS is not equipped for complex equation solving or graphing.
Raghav Gupta
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How can we solve equation with 4 variables in this calculator?
For 3 it solves in equation mode. Or the 4x4 matrix is not there?

Can the calculator show graphs?
 
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4x4 matrix is NOT there. Nor are there any graphing features, the dot matrix display allows for viewing equations.
 
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