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Question: How to obtain the parameters used in the RHS by the solve command

Question:How to obtain the parameters used in the RHS by the solve command

petit loup 40 Maple 2017
solve substitution
December 10 2017
1

Hi...  I use the "solve" command to solve an algebraic  system. Sometimes, the solution is given using some unknowns as parameters.

A toy example: x+y+z=1,x-y+3z=7 gives x=-2z+4,y=z-3 as a function of the parameter z (in the RHS).

Can I obtain directly (without going through the block-by-block solution) the set of parameters used in the given solution?

Thanks in advance.
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