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put this solution on YOUR website! Solve the following system :
-9x + 3y -2z = 61
8x + 7y + 5z = -138
5x - 5y + 8z = -45
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-36x + 12y -8z = 244 --- 1st eqn times 4
5x - 5y + 8z = -45
---------------------------- Add
-31x + 7y = 199 ---- z eliminated (Eqn A)
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-45x + 15y - 10z = 305 --- 1st eqn times 5
16x + 14y + 10z = -276 --- 2nd eqn times 2
-------------------------------------------------- Add
-29x + 29y = 29
-x + y = 1 --- z eliminated (Eqn B)
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-31x + 7y = 199
-7x + 7y = 7 Eqn B times 7
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Subtract
-24x = 192
x = -8
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Sub for x in Eqn B find y
Sub x & y in any eqn and find z
