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

Question 926828: The system of equations x+2y+z=9, 2x+y+3z=7 can be expressed as
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
x+2y+z=9,
-2(2x+y+3z=7 )
-3x -5z = -5
= z
.........
x + 2y + (-3/5)x + 1 = 9
2y + (2/5)x = 8
y =
(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
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