https://www.ptcusercommunity.com/t5/Mathcad/solve-3-equations-with-3-unknowns/m-p/719039#M194972 <P>If you need to solve more problems like this, you can take the following approach:</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="LucMeekes_0-1615910029119.png" style="width: 400px;"><img src="https://www.ptcusercommunity.com/t5/image/serverpage/image-id/38964i632C5EDAA8D86168/image-size/medium?v=v2&amp;px=400" role="button" title="LucMeekes_0-1615910029119.png" alt="LucMeekes_0-1615910029119.png" /></span></P> <P>Success!<BR />Luc</P> Tue, 16 Mar 2021 15:54:30 GMT LucMeekes 2021-03-16T15:54:30Z https://www.ptcusercommunity.com/t5/Mathcad/solve-3-equations-with-3-unknowns/m-p/718930#M194965 <P>Hello everyone!&nbsp;I've already tried to solve in a block, it seems that something is missing, I'm waiting for your solutions, a lot of thanks&nbsp;</P> <UL id="list_0" class="lia-list-standard" role="list"> <LI><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Valentina_0-1615896199191.png" style="width: 400px;"><img src="https://www.ptcusercommunity.com/t5/image/serverpage/image-id/38929i0883D6D5BA78478D/image-size/medium?v=v2&amp;px=400" role="button" title="Valentina_0-1615896199191.png" alt="Valentina_0-1615896199191.png" /></span> <P>&nbsp;</P> </LI> </UL> Tue, 16 Mar 2021 13:11:18 GMT https://www.ptcusercommunity.com/t5/Mathcad/solve-3-equations-with-3-unknowns/m-p/718930#M194965 Valentina 2021-03-16T13:11:18Z https://www.ptcusercommunity.com/t5/Mathcad/solve-3-equations-with-3-unknowns/m-p/718991#M194968 <P><SPAN>One possible and quick solution would be without units of measurement:</SPAN></P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="CornelBejan_0-1615901912760.png" style="width: 806px;"><img src="https://www.ptcusercommunity.com/t5/image/serverpage/image-id/38956iA35006A5011039CA/image-dimensions/806x164?v=v2" width="806" height="164" role="button" title="CornelBejan_0-1615901912760.png" alt="CornelBejan_0-1615901912760.png" /></span></P> <P>&nbsp;</P> Tue, 16 Mar 2021 13:42:04 GMT https://www.ptcusercommunity.com/t5/Mathcad/solve-3-equations-with-3-unknowns/m-p/718991#M194968 Cornel 2021-03-16T13:42:04Z https://www.ptcusercommunity.com/t5/Mathcad/solve-3-equations-with-3-unknowns/m-p/719030#M194971 <P>Not sure what you did (POST YOU SHEET), but</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Fred_Kohlhepp_0-1615905897653.png" style="width: 400px;"><img src="https://www.ptcusercommunity.com/t5/image/serverpage/image-id/38962i9F6CA562E4A48702/image-size/medium?v=v2&amp;px=400" role="button" title="Fred_Kohlhepp_0-1615905897653.png" alt="Fred_Kohlhepp_0-1615905897653.png" /></span></P> <P>&nbsp;</P> Tue, 16 Mar 2021 15:14:35 GMT https://www.ptcusercommunity.com/t5/Mathcad/solve-3-equations-with-3-unknowns/m-p/719030#M194971 Fred_Kohlhepp 2021-03-16T15:14:35Z https://www.ptcusercommunity.com/t5/Mathcad/solve-3-equations-with-3-unknowns/m-p/719039#M194972 <P>If you need to solve more problems like this, you can take the following approach:</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="LucMeekes_0-1615910029119.png" style="width: 400px;"><img src="https://www.ptcusercommunity.com/t5/image/serverpage/image-id/38964i632C5EDAA8D86168/image-size/medium?v=v2&amp;px=400" role="button" title="LucMeekes_0-1615910029119.png" alt="LucMeekes_0-1615910029119.png" /></span></P> <P>Success!<BR />Luc</P> Tue, 16 Mar 2021 15:54:30 GMT https://www.ptcusercommunity.com/t5/Mathcad/solve-3-equations-with-3-unknowns/m-p/719039#M194972 LucMeekes 2021-03-16T15:54:30Z https://www.ptcusercommunity.com/t5/Mathcad/solve-3-equations-with-3-unknowns/m-p/719048#M194973 <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Valentina_1-1615911257567.png" style="width: 400px;"><img src="https://www.ptcusercommunity.com/t5/image/serverpage/image-id/38967i8DCC658458644DC7/image-size/medium?v=v2&amp;px=400" role="button" title="Valentina_1-1615911257567.png" alt="Valentina_1-1615911257567.png" /></span></P> <P>it worked, thanks</P> <P>&nbsp;</P> Tue, 16 Mar 2021 16:13:43 GMT https://www.ptcusercommunity.com/t5/Mathcad/solve-3-equations-with-3-unknowns/m-p/719048#M194973 Valentina 2021-03-16T16:13:43Z https://www.ptcusercommunity.com/t5/Mathcad/solve-3-equations-with-3-unknowns/m-p/719049#M194974 <P>Note that you need only three guess values, when solving for three variables. (Delta, h and R).</P> <P>The values for X.A,B,C &amp; Y.A,B and C are 'knowns', and can be placed above (outside of) the solve block.</P> <P>&nbsp;</P> <P>Success!<BR />Luc</P> Tue, 16 Mar 2021 16:20:17 GMT https://www.ptcusercommunity.com/t5/Mathcad/solve-3-equations-with-3-unknowns/m-p/719049#M194974 LucMeekes 2021-03-16T16:20:17Z