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Solve a system with 3 variables and 3 equations using W|A?

Posted 1 month ago
2 Replies
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I get the message "Wolfram|Alpha doesn't understand your query" when I try to input this equation:

a+x+g=0, b+y+h=0, c+z+j=0, a2+b2+c2=R2, x2+y2+z2=R2, g2+h2+j2=R2, R=1, x=1

It's a 3 variables 3 equations system about 3 vectors (x,y,z), (a,b,c), (g,h,j), distributed in a 3d sphere. The constraints are radius = 1 and x = 1. I want to solve it for y,z; a,b,c and g,h,j.

Can someone explain to me why Wolfram|Alpha isn't understanding the input?


2 Replies
Posted 1 month ago

If I have correctly understood your problem, you should type: a+x+g=0, b+y+h=0, c+z+j=0, a^2+b^2+c^2=R^2, x^2+y^2+z^2=R^2, g^2+h^2+j^2=R^2, R=1, x=1

Posted 1 month ago

The R=1 and x=1 appear to confuse WolframAlpha.


solve a+1+g=0, b+y+h=0, c+z+j=0, a^2+b^2+c^2=1, 1+y^2+z^2=1 for real y


will have WolframAlpha solve for real values of y and solve for all the other variables at the same time.

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