I have the equation x + y = 15 and I'm looking for solution only in the range x=1..9 and y=1..9, x and y both integer Is there a sage-command to do that?
I tried it with var('x, y') assume(x,"integer") assume(x>0) assume(y, "integer") assume(y>0) solve(x+y==15,x,y)
The result was (t_0, -t_0 + 15) obviously right, but not 6,9 7,8 8,7 and 9,6
Thanks in advance Bert Henry