I try to solve a simple system of four linear equations in the variables ch1, ch2, co1 and co2:
Solve[{ch2 - ch1 == dch , co2 - co1 == dco , ch1*t1 + co1*t1 - co1 == 0, ch2*t2 + co2*t2 - co2 == 0}, {ch1, ch2, co1, co2}]
where: t1, t2, dch and dco are constants.
I cannot figure out what is going wrong. W|A relpies "Wolfram|Alpha doesn't understand your query".
I think the above is very similar to
Solve[{2 x - y == 0, -x + 2 y - z == -1, -3 y + 4 z == 4 a}, {x, y, z}]
which works well.
What am I doing wrong?
Wolfram Alpha doesn't like variables with more than one character and doesn't like the asterisk symbol * as multiplication. It's a bit dumb like that. If you replace the multi-character variables with single letters, and replace strings such as 'x*y' with 'x(y)' then everything should work fine like so.