Sorry.. I want to be more simple:
For the graph of
I can use ImplicitPlot.. as it was kindly suggested in a message.
Now, for the graph of:
x + y + z ==10
x + y + 0*z == 5
x + 0*y+ z == 5
0*x+ y + y +0*z == 5
May I use some kind of ImplicitPlot in 3D?.(It is obvious that I want to graph this hyperplanes)
I appreciate a lot this forum and the help.