I have the answers to all exercises, worked out, including proofs, in my Free text Linear Algebra. Took me a year. (Also, as you say, I am sometimes told by potential adopters thta they cannot use the book because it has the answers. That argument is fast losing its impact, though, as it has become clear even to middle aged professors that for any major commercial text any undergraduate can get the full answers off the net in minutes.)
I have the answers to all exercises, worked out, including proofs, in my Free text Linear Algebra. Took me a year. (Also, as you say, I am sometimes told by potential adopters thta they cannot use the book because it has the answers. That argument is fast losing its impact, though, as it has become clear even to middle aged professors that for any major commercial text any undergraduate can get the full answers off the net in minutes.)