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3x+2y+z=39 (1)
2x+3y+z=34 (2)
x+2y+3z=26 (3)
(1)-(2)
x-y=5 (4)
3(2)-(3)
5x+7y=76 (5)
7(4)+(5)
12x=111
x=37/4
from (4)
37/4 - y=5
y=17/4
from (3)
x+2y+3z=26
37/4+34/4 + 3z = 26
z = 11/4
(x,y,z) =(37/4, 17/4,11/4)
2x+3y+z=34 (2)
x+2y+3z=26 (3)
(1)-(2)
x-y=5 (4)
3(2)-(3)
5x+7y=76 (5)
7(4)+(5)
12x=111
x=37/4
from (4)
37/4 - y=5
y=17/4
from (3)
x+2y+3z=26
37/4+34/4 + 3z = 26
z = 11/4
(x,y,z) =(37/4, 17/4,11/4)
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