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Solving "join" simultaneous eqn in casio fx991-es watch

    • Thread Starter

    Pardon me if it sounds like another thread asking how to use the Casio fx991-es calculator again. I searched for some time but couldn't find something that does what I am trying to do.

    I know the fx991-es can solve simultaneous equations but it seems that I can only enter equations that are well separated like 2x+4y=8.

    But usually simultaneous don't come in this form, especially when doing problems involving like the Lagrange multiplier which would give a hell mess of simultaneous equations. The simultaneous equations usually come in like: yz=x, 2y+z/x=5, or even sin(x)+cos(y)=0, etc...
    Can the calculator to solve a set of simultaneous equations that has such equations?


    No I doubt it

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