how to solve a simultaneous equation of 2 variables.

x+3y=5;2x+4y=4. In general maths, we can be able to find the values of 'x' and 'y' from the above equations. How to find it in MATLAB?

Answer 1

[Walter Roberson]

If you have the Symbolic toolbox,

syms x y
solve(x + 3*y - 5, 2*x + 4*y - 4)

[Sivakumaran Chandrasekaran]

    x: [1x1 sym]
    y: [1x1 sym]. this is the answer which i got.. but i want to know the value of x and y.. no values are stored in workspace also

[Mandar Parkhi]

hi walter, how to get symbolic toolbox ?

Answer 2

[Anand]

A = [1 3;...
     2 4;];
b = [5;...
     4];

%Solve Ax=b as A\b
X = A\b
>> A\b

ans =

      -4
       3

Read more here: http://www.mathworks.com/help/matlab/ref/mldivide.html

[Mandar Parkhi]

Thanks Anand

Answer 3

[Ali Al-khadher]

%{
ax+by=c....equ(1)
dx+ey=f....equ(2)
A=[a b;d e]
B=[c f]
sol=A/B
x=sol(1) 
y=sol(2) 
example 
3x-9y=-42....equ(1)
2x+4y=2......equ(2)
%}
A = [3 -9;2 4]
b = [-42;2]
%Solve Ax=b as A\b
sol=A\b;
x=sol(1)
y=sol(2)

[Timothy Beckham]

I am grateful for the solution. I was looking for something similar and came across this page. Thank you very much!

Answer 4

[SHREY VERMA]

You can use this file for solving 2, 3, 4 or more variable for solving linear equation, which may consist of real or complex number.