How to define an arbitrary constant for equations?

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Yunus Emre ERYILMAZ
评论： Yunus Emre ERYILMAZ 2018-3-27
Hello everyone. I want to define a arbitrary constant for equations that I wrote. How can I define? I tried to define with cond command but it didn't work.
v1=6;
v3=18;
syms v2 v4 v5 v6
eqn1= -v4+v5==-v3;
eqn2= -v2+v6==v3;
eqn3= -v5-v6==-v1;
cond= v6~=0;
[v2 v4 v5 v6]=solve(eqn1, eqn2, eqn3);
[v2 v4 v5 v6]

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采纳的回答

Birdman
Birdman 2018-3-26
If you are talking about making an assumption, you can do it as follows:
v1=6;
v3=18;
syms v2 v4 v5 v6
eqn1= -v4+v5==-v3;
eqn2= -v2+v6==v3;
eqn3= -v5-v6==-v1;
assume(v6~=0)
[v2 v4 v5 v6]=solve(eqn1, eqn2, eqn3);
[v2 v4 v5 v6]

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