SOLUTION: Solve the system by substitution. -x-y-z=-8 -4x+4y+5z=7 2x+2z=4

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Question 930708: Solve the system by substitution.
-x-y-z=-8
-4x+4y+5z=7
2x+2z=4
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
4(-x-y-z=-8)
-4x+4y+5z=7
-8x + z = -25
.........
2x + 2z = 4, z = 2+-+x
..........
-8x + z = -25
-8x + (2-x) = -25
-9x= -27
x = 3, z = -1 and y = 6 y+=+-x+-z+%2B+8
.........
(3, 6, -1) the solution for this System