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[求助] 跪求matlab求解方程组的程序

刚接触到matlab,急需求解以下方程组的解。求求高手帮帮忙。

方程1:   a=x+exp(9.8*log(10)+log(x)-y*log(10))+exp(30.14084+log(x)-4.6051*y)+exp(38.40712+2*log(x)-4.6051*y)+exp(45.2458+3*log(x)-4.6051*y)+exp(50.31148+4*log(x)-4.6051*y)+exp(48.99901+5*log(x)-4.6051*y
方程2:   b=4*z
方程3:   6*z+exp(-14.18*log(10)+y*log(10))=2*u+exp(9.8*log(10)+log(x)-y*log(10))+exp(-y*log(10))
方程4:   u=exp(20.37788-4.60517*y)+exp(30.14084+log(x)-4.6051*y)+exp(38.40712+2*log(x)-4.6051*y)+exp(45.2458+3*log(x)-4.6051*y)+exp(50.31148+4*log(x)-4.6051*y)+exp(48.99901+5*log(x)-4.60517*y)+exp(2.325611-2.30259*y)+exp(-15.4503)+exp(-44.1866+2.302585*y)+exp(-74.3044+4.60517*y)+2*exp(15.24311-4.60517*y)+exp(22.03574+log(x)-2.30259*y)+exp(-40.042+log(x)+2.302585*y)+exp(-8.77285+2*log(x))
其中a,b是从0到10 的变化量,变化步数为1,即a或b=0,1,2,3,4,5,6,7,8,9,10,求出其中的x,y,z,u。

求具体的可以运行除结果的程序。
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