SOLUTION: The system of equations x+2y+z=9, 2x+y+3z=7 can be expressed as

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Question 926828: The system of equations x+2y+z=9, 2x+y+3z=7 can be expressed as
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
x+2y+z=9,
-2(2x+y+3z=7 )
-3x -5z = -5
%28-3%2F5%29x+%2B+1 = z
.........
x + 2y + (-3/5)x + 1 = 9
2y + (2/5)x = 8
y = %28-2%2F10%29x+%2B+4
(x, (-2/10)x + 4, (-3/5)x + 1) for all values of x
.....
x = 10
(10, 2, -5)
......
And...checking
x+2y+z=9
10 + 4 - 5 = 9