Trying to solve 4 equation with 4 unknowns
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omercan demirel
il 10 Ott 2015
Commentato: Tamara
il 2 Ago 2022
Hello,
I am trying to solve this problem:
2a + 1b + 0c + 6d = 64
5a + 2b + 0c + 0d = 37
0a + 7b + 2c + 2d = 66
0a + 0b + 8c + 9d = 104
So I wrote this code:
clear;
clc;
equation1=64-2*a-b-6*d;
equation2=37-5*a-2*b;
equation3=66-7*b-2*c-2*d;
equation4=104-8*c-9*d;
sol=solve(equation1,equation2,equation3,equation4);
But it gives Undefined function or variable 'a' in line 3. I know I am missing something very obvious but I cannot find it. Could you help me?
Thank you.
3 Commenti
Yashas Kumar G B
il 10 Ott 2020
It's easier than all discription which can easily understood by students . By seeing that we can get general syntax of problem of such typee
Tamara
il 2 Ago 2022
x + y + z + w = 10.3 2x - 7y + z - w = -1.5 -X - 3y - z + w = -6.9 3x + z - w = 2.4
Risposta accettata
Walter Roberson
il 10 Ott 2015
syms a b c d
equation1=64-2*a-b-6*d;
equation2=37-5*a-2*b;
equation3=66-7*b-2*c-2*d;
equation4=104-8*c-9*d;
sol=solve(equation1,equation2,equation3,equation4);
3 Commenti
Walter Roberson
il 10 Ott 2015
Is that a problem? You asked for a symbolic solution and you received a symbolic solution. You can look at the individual solutions with, for example,
sol.a
Più risposte (1)
Liang Wei Teo
il 10 Ott 2015
you can try changing everything to matrix and solve it using Ax=b
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