# Find optimum value to fit with the answer

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Ali Tawfik on 25 Aug 2020
Commented: Ali Tawfik on 26 Aug 2020
Hi all,
I would like to know how to find an optimium value to reach or fit with the final result even if I change other variables as shown:
clear all;
clc;
x=10; y=20;
k=x+y;
f=20; m=10;
t=1; % I need to find the optimum value of t which should be in this case 41
final=k+f+m+t
if final<100
disp('ok')
else
disp('no')
end
##### 2 CommentsShowHide 1 older comment
Rik on 25 Aug 2020
Don't use clear all. It clears all functions that were loaded to memory, which causes everything to be slower. If you want to clear the variables in a debugging context you can use clear or clearvars. Outside of debugging you should use functions to keep your workspace clean.

esat gulhan on 25 Aug 2020
Edited: esat gulhan on 25 Aug 2020
Can it be like this, if you want to find value if final>100
clc;clear;
syms x y t k f m
x=10; y=20;
k=x+y;
f=20; m=10;
final=k+f+m+t>=100
t=solve(final,t)
of if you want to find value if final=100
clc;clear;
syms x y t k f m
x=10; y=20;
k=x+y;
f=20; m=10;
final=k+f+m+t==100
t=solve(final,t)
Ali Tawfik on 26 Aug 2020
@Esat,
Thanks for your prompt reply. Would you mind having look into my new question , as I need help !!