matlab 怎么解-8x1+x2+6x3=0 4x1-5x2+x3=0 4x1+4x2-7x3=0 设置一个变量c在60到80之间然后将x1 x2 x3 用c来表示 matlab代码

syms c;

% 用c表示x1, x2, x3 x1 = c/4; x2 = (c + 6c/4)/5; x3 = (4c - 8c/4 - 4(c + 6*c/4)/5)/7;

% 检验方程组是否成立 eq1 = -8x1 + x2 + 6x3 == 0; eq2 = 4x1 - 5x2 + x3 == 0; eq3 = 4x1 + 4x2 - 7*x3 == 0;

% 输出方程组的解 sol = solve([eq1, eq2, eq3], [x1, x2, x3]); sol.x1 sol.x2 sol.x3