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How to solve these 4 equations

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Yoshi
Yoshi 2016-1-22
回答： Star Strider 2016-1-22
Hello, I'm trying to solve these set of 4 equations and am unsure how to write them up in matlab. So far this is what I've tried with no luck:
syms a b c d
e1=a+d==1;
e2=2*a+b+2*c+d==5;
e3=2*b==2;
e4=(d/(a+b+c+d))^2*(c/(a+b+c+d))/(a/(a+b+c+d))==exp(-2.222)/5;
[e1,e2,e3,e4] = solve(e1, e2, e3, e4);
I am very much a beginner at Matlab for reference so am unsure how to solve this besides pressing the run key.

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Star Strider
Star Strider 2016-1-22
I would use the vpasolve function to get a numeric result:
[a,b,c,d] = vpasolve([e1, e2, e3, e4], [a,b,c,d]);

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