2 Equations symbolic system

[mzampolla]

Hi everybody, my name is Marcello and I am absolutely new with MathCad.

I succeded in solving a symbolic equation, now I want to know how to solve a symbolic system of 2 equations in x,y like the following:

x^2+y^2=r^2

y=mx+q

thanks in advance for your help

[AlanStevens · Accepted solution]

Like so:

Alan

[mzampolla]

Yes, it's exactly what I want to do!

How can I do the parentesis? Sorry for being a totally newbie...

[mzampolla]

Great!!! I succeded!!! Thanx a lot!

[BillyBag2]

How can I do the parenthesis? Cannot see the reply.

[Fred_Kohlhepp]

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@BillyBag2 wrote:

How can I do the parenthesis? Cannot see the reply.

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I believe the "parenthesis" is actually an array (insert matrix)

[Werner_E]

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@BillyBag2 wrote:

How can I do the parenthesis? Cannot see the reply.

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?? Not sure what exactly you mean and what you can't see.

In Prime you may simply type an opening square bracket [ and Prime will create a matrix. You can enlarge it vertically by pressing Shift Enter and horizontally by pressing Shift Space.

[BillyBag2]

Thanks, thread contains question about adding parenthesis. Can see a thanks to the reply but no reply itself. Did not realise it was a matrix. All working now, thanks guys for your help. 

[mzampolla]

One more question...when the system is solved I obviously get 2 results, how can I do to take one (the positive) result and to put into a graph?

In other worìds I want to put in a graph how x varies in relation to m and by expressing m=tan(α) how x and y change in relation to α.

[AlanStevens]

Do you mean something like this (obviously, I've made up the numbers):

Alan

[mzampolla]

Yes, Alan you are great!