SOLUTION: 5r-s+t=-9 2r+2s-3t=5 r-3s+2t=-14

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Question 1000833: 5r-s+t=-9
2r+2s-3t=5
r-3s+2t=-14
Answer by Alan3354(69443) About Me  (Show Source):
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5r-s + t = -9
2r+2s -3t = 5
r -3s +2t =-14
--------------
10r-2s +2t = -18 Eqn 1 times 2
2r+2s -3t = 5
--------------------- Add
12r - t = -13 Eqn A
----
15r-3s +3t = -27 Eqn 1 times 3
r -3s +2t = -14
------------------- Subtract
14r + t = -13
12r - t = -13 Eqn A
--------------------------- Add
26r = -26
r = -1
*****************
12r - t = -13 Eqn A
-12 - t = -13
t = 1
****************
2r+2s -3t = 5
-2 + 2s - 3 = 5
s = 5