Solve Linear Simultaneous Equations on the FX-991EX Classwiz Calculator 

Maam i am from Bangladesh, In our country this type means casio fx 991Ex calculator are not found and the company become stop making it, so plzz can you send me this calculator , its serious am a admission candiadatestudent, when u will see my comment plzz rply and send me, i am free found of this calculator 😥 @helenmathstuctor

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My pleasure! Best wishes from England 🍁🌳🏠🍂

You're very welcome 😊

Very happy to hear that it was helpful :)

You are very welcome :)

Glad the video was helpful. I used the negative sign, which has the symbol (-) when entering the negative y coefficient of the second equation. You will be able to see the button that I pressed to do that directly to the left of the piece of paper on the calculator keyboard. :)

​@@helenmathstutorwht if the the equation is 3x-y=0 and 2x-y=1 So how r gonna keep the y , y bt with minus sign

You are most welcome 😊

You're very welcome 😊

Good question! Unfortunately I can't find a way of dealing with this case on this calculator.

If the calculator isn't giving you finite values a likely reason is that the simultaneous equations you're trying to solve are for a pair of parallel lines. Parallel lines meet at infinity hence your infinite solution error. Hope this helps.

I don't think you can on this calculator

Could you explain a little bit more about what you mean?

@@helenmathstutor The equations I have are specifically 0.2x+y=180000 and 1-0.1y=200000. So when I input the coefficient of x and y, it gives me math error

I'm not familiar with the other Classwiz calculators so couldn't say.

I don't think there's a way to do it on this calculator. Sub the first equation into the second and then solve the resulting quadratic equation is how you do it on paper. Good luck!

That's a shame :(

Good to hear that you are a very confident simultaneous equation solver!

​@@helenmathstutor😂😂😂