(Matlab) beam deflection solution using symbolic simultaneous equations

[yecko]

I have tried to searched for functions online and apply it, but still it does not work well.
May I ask how can I solve symbolic simultaneous equations with Matlab? Or is there anything went wrong with my program?

Homework Statement

Consider a stepped beam shown in below. The beam is statically indeterminate and a concentrated force P is applied at B. As shown in the figure, the segments of AC and CD have the rigidities of EI1 and EI2, respectively. Determine the deflections at B and C using singularity functions. Note: You might need to use a symbolic equation solver (Matlab, Mathematica, etc.) to solve simultaneous equations.

Homework Equations

(below, in my attempt)

The Attempt at a Solution

(I use symbol A in Matlab for F(A) in my handwritten)

Where F(A) should not be in terms of F(A) itself. A, B, D, M suppose all can be expressed in constants (i.e. P L E I1 I2).

By what command can I solve the deflection function (y1 and y2) only in terms of constants (i.e. P L E I1 I2)? Or if my calculation is incorrect? Thank you.

 

[LightHero]

You can use Matlab's symbolic equation solver to solve your simultaneous equations. You can use the command "solve" to solve a system of equations, where each equation is written as an expression in terms of the variables you want to solve for.For example, if you have two equations of the form:A = 2*x + 3*yB = 5*x + 7*yThen you can solve for x and y by using the following command:[x, y] = solve(A - 2*x - 3*y, B - 5*x - 7*y)This will give you the solutions for x and y in terms of the constants A and B. You can then plug these solutions into your deflection functions to get the deflection at B and C.