I see that you are seeking guidance on how to enter and solve static equilibrium equations in MATLAB. I assume that you are using MATLAB R2023b.
You can use MATLAB's symbolic math capabilities to define and solve equations symbolically. To do this, you'll need to use the Symbolic Math Toolbox. More about it can be seen here on the documentation page: https://www.mathworks.com/help/symbolic/
Here is how you can solve your static equilibrium problem using the Symbolic Math Toolbox:
% First, clear the workspace and command window
clear; clc;
% Import the symbolic library
syms Ay By % Define the unknowns as symbolic variables
% Define the given values
g = 9.81; % Acceleration due to gravity (m/s^2)
weight = 300 * g; % Weight of the object (N)
% Define the equilibrium equations
eq1 = Ay - By - weight == 0; % Sum of forces in y-direction
eq2 = -By * 0.6 + weight * 0.4 == 0; % Moment about point A
% Solve the system of equations
solutions = solve([eq1, eq2], [Ay, By]);
% Display the solutions
Ay_solution = double(solutions.Ay);
By_solution = double(solutions.By);
fprintf('The solution is:\n Ay = %.2f N\n By = %.2f N\n', Ay_solution, By_solution);
If you don't have the Symbolic Math Toolbox, you can also solve the equations numerically using MATLAB's built-in functions for numerical computation.
