MATLAB: Solving simultaneous equations without martix method

simultaneous equation

What is simply way to solve for a simultaneous equation like below without the uses of matrix method. I was hoping to implement to a hard equation as below is just a example.

x+y=10
x+2*y=15

Best Answer

You would most likely have to use the Symbolic Math Toolbox:

syms x y 
Eq1 = x + y == 10;
Eq2 = x + 2*y == 15;
[x,y] = solve(Eq1, Eq2)
x =
5
y =
5

Related Solutions

MATLAB: Solving Diophantine Equations in MATLAB

Use the “solve” function. Before using “solve”, assume that the variables in the Diophantine equation are integers to ensure “solve” returns integer solutions. For example, solve the linear Diophantine equation 1027*x + 712*y = 1;

For MATLAB R2015a and later:

syms x y integer                % assume ‘x’ and ‘y’ are integers

eqn = 1027*x + 712*y == 1;       % declare the equation

[xSol, ySol] = solve(eqn,[x y])  % solve for ‘x’ and ‘y’

xSol =
-165
ySol =
238

For MATLAB R2014b or before:

syms x y
assume([x y], 'integer')        % assume ‘x’ and ‘y’ are integers
eqn = 1027*x + 712*y == 1;       % declare the equation
[xSol, ySol] = solve(eqn,[x y])  % solve for ‘x’ and ‘y’
xSol =
-165
ySol =
238

For details on “solve”, see: https://www.mathworks.com/help/symbolic/solve.html

For more information on assumptions, see: https://www.mathworks.com/help/symbolic/assumptions-for-symbolic-objects.html

MATLAB: Re-arranging huge martix

B = transpose(reshape(transpose(A), 2, []));

Best Answer

Related Solutions

MATLAB: Solving Diophantine Equations in MATLAB

MATLAB: Re-arranging huge martix

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