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ptc-66357621-Visitor
1-Visitor
September 15, 2014
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Solve for a variable in an equation symbolically

  • September 15, 2014
  • 1 reply
  • 19119 views

Hello Everyone,

I am new to MathCAD so forgive me if this is a basic question:

If you have an equation, let's say "a*b*c = d*e" where "a","b","c","d","e" are all variables and you want to symbolically solve "a", can MathCAD do this?

Cheers,

Jeff

Best answer by RichardJ

Ignore the red. it's just the numeric processor complaining. The symbolic procesor doesn't care if a variable is undefined.

Type a*b*c=d*e. Note the bold equals, which you get with <Ctrl>=. Click on "solve" on the symbolic toolbar, type ,a. You will see the result. You may get some strange numbers in the result. If you do, it's because the symbolic processor is seeing c as the speed of light. You can fix this by typing c:c (which will display as c:=c) above the expression.

1 reply

M
MoeSzyslak12-Amethyst
12-Amethyst
September 15, 2014

Just check out the symbolic toolbar.

Capture.PNG

P
ptc-66357621-VisitorAuthor
1-Visitor
September 15, 2014

I tried to enter what you have but "a","b","c" are highlighted red and I can't enter that space in between "solve" and "e". I want MathCAD to give me a->d*e/(b*c).

Thanks,

Jeff

R
RichardJ19-TanzaniteAnswer
19-Tanzanite
September 15, 2014

Ignore the red. it's just the numeric processor complaining. The symbolic procesor doesn't care if a variable is undefined.

Type a*b*c=d*e. Note the bold equals, which you get with <Ctrl>=. Click on "solve" on the symbolic toolbar, type ,a. You will see the result. You may get some strange numbers in the result. If you do, it's because the symbolic processor is seeing c as the speed of light. You can fix this by typing c:c (which will display as c:=c) above the expression.

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