Error in solving equation

[yingwuluo]

   
   
   
   

Error in solving equation
The program always selects all variables by default. You need to select the variables you need one by one. Can you not select all variables by default?

[roadrunner]

The issue is the second page of variables. It appears that the solver app only supports up to 12 variables, you have 16. The second page of variables isn't being counted or looked at.

To solve your system I created the app variables, then did the following:

in cas:
'SIGEMA=ES*KESICU*((B1*H0/X)-1)'▶E1
'N=A1*FC*B*X+FY*AS-SIGEMA*AS'▶E2
'N*E=A1*FC*B*X*(H0-(X/2))+FY*AS*(H0-BHC)'▶E3
'E=(M/N)+MAX(20,(H/30))+(H/2)-BHC'▶E4

Uncheck E1, E2, E3 and leave only E4 checked.
Solve for E which give 435.
Edit E3 by replacing E with 435 and BHC with 35 which give you:
N*435=A1*FC*B*X*(H0-(X/2))+FY*AS*(H0-35) stored in E3
Finally, uncheck E4, check only E1, E2, and E3, then solve for SIGEMA, X, and AS since there are now only 12 variables in the first 3 equations.

I got SIGEMA = 257.34, X = 115.12, and AS = 13067, but there are other solutions as well.

Here are two screen shots showing what I did:

   
   

-road

[yingwuluo]

Thank you for your answer

[yingwuluo]

(03-09-2022 04:08 PM)roadrunner Wrote:  The issue is the second page of variables. It appears that the solver app only supports up to 12 variables, you have 16. The second page of variables isn't being counted or looked at.

To solve your system I created the app variables, then did the following:

in cas:
'SIGEMA=ES*KESICU*((B1*H0/X)-1)'▶E1
'N=A1*FC*B*X+FY*AS-SIGEMA*AS'▶E2
'N*E=A1*FC*B*X*(H0-(X/2))+FY*AS*(H0-BHC)'▶E3
'E=(M/N)+MAX(20,(H/30))+(H/2)-BHC'▶E4

Uncheck E1, E2, E3 and leave only E4 checked.
Solve for E which give 435.
Edit E3 by replacing E with 435 and BHC with 35 which give you:
N*435=A1*FC*B*X*(H0-(X/2))+FY*AS*(H0-35) stored in E3
Finally, uncheck E4, check only E1, E2, and E3, then solve for SIGEMA, X, and AS since there are now only 12 variables in the first 3 equations.

I got SIGEMA = 257.34, X = 115.12, and AS = 13067, but there are other solutions as well.

Here are two screen shots showing what I did:




-road

Thank you for your answer, there is no limit on the number of variables to solve the equation, but it is not a touch screen.