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Solving for X
01-25-2019, 01:34 AM
Post: #1
Solving for X
Help,

I am trying to solve -3(4x-2.8)= -5(4x-2.8) for x using the HP Prime.

The answer should be X = 0.7.

In CAS mode I entered SOLVE( -3(4x-2.8)= -5(4x-2.8) ) and received

Error: Bad Argument Value.

Would someone please tell me the steps to accomplish the solution with the HP Prime?

Cheers!
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01-25-2019, 01:59 AM
Post: #2
RE: Solving for X
There is no implicit multiplication, so your entry needs to be

solve (-3*(4*x-2.8)=-5*(4*x-2.8))

Note the lowercase variable usage and the command in lowercase too. Use the Help button too when exploring the commands.

HTH,
~Mark

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01-25-2019, 02:10 AM
Post: #3
RE: Solving for X
Thank you Mark. It works for me now. Cheers!
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01-25-2019, 04:16 PM
Post: #4
RE: Solving for X
Hi!, MullenJohn :
Try, in CAS, with ...


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01-25-2019, 05:00 PM
Post: #5
RE: Solving for X
Thank you - very nice - Cheers!
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