topic Re: Substituting and Solving Equations in Mathcad https://www.ptcusercommunity.com/t5/Mathcad/Substituting-and-Solving-Equations/m-p/8210#M3183 <HTML><HEAD></HEAD><BODY><P>Werner is right; the equation is a cubic not a quartic as I say in my worksheet. It can be solved symbolically to find the only positive solution:</P><P></P><P><IMG __jive_id="60990" alt="MHelp.PNG" class="jive-image-thumbnail jive-image" src="https://community.ptc.com/legacyfs/online/60990_MHelp.PNG" width="450" /></P><P>Alan</P></BODY></HTML> Sat, 09 Nov 2013 14:29:05 GMT AlanStevens 2013-11-09T14:29:05Z Substituting and Solving Equations https://www.ptcusercommunity.com/t5/Mathcad/Substituting-and-Solving-Equations/m-p/8206#M3179 Hello,I was wondering what the best way to solve a set of equations would be. The process I was hoping to use was to define a bunch of variables (some of the varibales have unknowns) and then set them all equal to eachother and/or substitute equations into one another in order to Thu, 03 May 2018 16:45:54 GMT https://www.ptcusercommunity.com/t5/Mathcad/Substituting-and-Solving-Equations/m-p/8206#M3179 dnolan 2018-05-03T16:45:54Z Re: Substituting and Solving Equations https://www.ptcusercommunity.com/t5/Mathcad/Substituting-and-Solving-Equations/m-p/8207#M3180 <HTML><HEAD></HEAD><BODY><P>Can't figure out what you're trying to do, so the only suggestion is to read the help file entry on Solve Block</P><P></P><P>TTFN</P></BODY></HTML> Sat, 09 Nov 2013 05:59:58 GMT https://www.ptcusercommunity.com/t5/Mathcad/Substituting-and-Solving-Equations/m-p/8207#M3180 IRstuff 2013-11-09T05:59:58Z Re: Substituting and Solving Equations https://www.ptcusercommunity.com/t5/Mathcad/Substituting-and-Solving-Equations/m-p/8208#M3181 <HTML><HEAD></HEAD><BODY><P>The attached might help, though I'm not sure it does exactly what you want.</P><P></P><P>Alan</P></BODY></HTML> Sat, 09 Nov 2013 10:04:54 GMT https://www.ptcusercommunity.com/t5/Mathcad/Substituting-and-Solving-Equations/m-p/8208#M3181 AlanStevens 2013-11-09T10:04:54Z Re: Substituting and Solving Equations https://www.ptcusercommunity.com/t5/Mathcad/Substituting-and-Solving-Equations/m-p/8209#M3182 <HTML><HEAD></HEAD><BODY><P>Your description is a bit confusing to me but I guess you are searching how to solve the equation q.s(B)=q for B.</P><P>See if the attached file can help doing so.</P><P></P><P>BTW, if you want to hide calculations from view you may consider putting them in a collapsed area.</P></BODY></HTML> Sat, 09 Nov 2013 12:33:50 GMT https://www.ptcusercommunity.com/t5/Mathcad/Substituting-and-Solving-Equations/m-p/8209#M3182 Werner_E 2013-11-09T12:33:50Z Re: Substituting and Solving Equations https://www.ptcusercommunity.com/t5/Mathcad/Substituting-and-Solving-Equations/m-p/8210#M3183 <HTML><HEAD></HEAD><BODY><P>Werner is right; the equation is a cubic not a quartic as I say in my worksheet. It can be solved symbolically to find the only positive solution:</P><P></P><P><IMG __jive_id="60990" alt="MHelp.PNG" class="jive-image-thumbnail jive-image" src="https://community.ptc.com/legacyfs/online/60990_MHelp.PNG" width="450" /></P><P>Alan</P></BODY></HTML> Sat, 09 Nov 2013 14:29:05 GMT https://www.ptcusercommunity.com/t5/Mathcad/Substituting-and-Solving-Equations/m-p/8210#M3183 AlanStevens 2013-11-09T14:29:05Z