Problema Solution
The value of z in the system of equations 3x + y+2z=3,2x-3y-z= -3 and x+2y+ z=4 is __________.
Answer provided by our tutors
3x+y +2z =3
y=3 -3x -2z -(1)
2x- 3y- z=-3
2x-3(3-3x-2z)-z=-3 (from 1)
2x -9 + 9x +6z -z =-3
11x+5z=6 -(2)
x+2(3-3x-2z)+z=4
-5x -3z =-2
5x +3z=2
z=1