I used the following matlab code to solve a system of algebraic equations, but I got no answer.
clear; clc; close all;
syms x y z u
eqns = [2x + 1 == 2ux, 4y == 2uy, 6z == 2u*z, x^2 + y^2 +z^2 == 1];
S = solve(eqns,[x y z u]);
S.u
the result says:
ans =
Empty sym: 0-by-1
But there should be answers, to see the answers, please refer to an MIT calculus course: https://www.youtube.com/watch?v=nDuS5uQ7-lo&list=PLkcAPvx7T8bBOOuDcxZE_sdTchjQcTyM-&index=29
So , what is wrong?