Question about Texas Instruments TI-83 Plus Calculator

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Equations I have a ti-83 plus that i haven'y used in years..... now I am trying to enter simple equations (7x+9=30) and can't get the answer............ could you please please walk me through the steps in entering and getting the answer to this equation I would really really appreciate it thanks

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Dear,

is there any INVALID DIM msg or not..

regards,

Posted on Oct 12, 2008

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You need to download starter edition-app4math

Posted on Oct 03, 2008

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Solving an equation in one variable. (Also known as finding the roots or x-axis intercepts.)
a) Enter the function and graph.
b) Press 2nd, CALC.
c) Press 2 to select zero.
d) Move the cursor to the left of the intercept and press ENTER.
e) Move the cursor to the right of the intercept and press ENTER.
f) Press ENTER again.
g) The root wilI appear at the bottom of the screen.
NOTE: This can also be done using the Solver. See the last item in this section for that procedure.

Posted on Oct 03, 2008

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This user manual will be helpful to you http://www.math.oregonstate.edu/home/programs/undergrad/TI_Manuals/ti83Guidebook.pdf

Hope that helps........

Posted on Oct 03, 2008

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You can't simply enter 7x+9=30 into the calculator, there is a way to calculate what the x is but its been a few years since I've done these..

Posted on Oct 03, 2008

  • Ekse Oct 03, 2008

    Hold on, I will try to figure it out for you.

  • Ekse Oct 03, 2008

    7x+9=30



    We turn it around

    7x = 30-9



    Minus

    7x = 21



    Devide both sides

    7x = 21 ||:7



    Answer

    x = 3

    7*3 +9 =30

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