2 equations 2 unknowns... Know this has been done to death but could really use help.

[SS_9985257]

Hello,

Mathcad Prime 7 n00b user here. I am trying to solve these two equations (pictured) by iteration without a previous value defined for Q but it is really stumping me. Currently I have Q defined but when it is undefined it really throws everything off and I am stuck. I will attach pictures and a file, feel free to edit as needed.

Thanks!

[SS_9985257]

I tired using a for loop but I cannot seem to get it to work.

[Fred_Kohlhepp · Accepted solution]

First of all--Mathcad understands units, USE THEM!

Second, did you really mean million cubic feet per hour?

Because if I put that thru a six inch pipe, it's going really fast:

Third, your equation for Reynold's Number doesn't balance:

File attached.