Solve sytem of linear equations in 3 variables
2x-3y+z=5
x+3y+8z=22
2x-y+2z=9
2007-10-28 07:35:36 · 3 answers · asked by Anonymous in Education & Reference ➔ Homework Help
well....the last equation ,multiplayed with -3 will be -6x+3y-6z=-27 you will summ that with the first =>-4x-5z=-22 =>x=(-5z+22)/4 now....(-5z+22)/4+3y+8z=22.from this you will obtein y lihe smth * z with x=(-5z+22)/4,y=.... *z you will return in one of those equqtion..and find z...then x and y
2007-10-28 07:47:15 · answer #1 · answered by gabrielle1989 1 · 0⤊ 0⤋
Let [A]=
[2 -3 1 5]
[1 3 8 22]
[2 -1 2 9]
Then do: rref([A])
The right column is your (x,y,z).
2007-10-28 07:49:34 · answer #2 · answered by bdc3141 4 · 0⤊ 0⤋
If we do it for you, you won't learn. Study the book. It should show you how it's done.
2007-10-28 07:44:07 · answer #3 · answered by punch 7 · 0⤊ 0⤋