Hi,

3x+4y+2z=3  |Multiplying thru by 4, Adding EQs

4x-2y-8z=-4

16x+14y = 8   0r 8x + 7y = 4



3x+4y+2z=3 

 x +y -z=3

5x+6y = 9



5x + 6y = 9 (-7)

8x + 7y = 4 (6)

13x = 39,  x = -3  and y = 4  

and z = (x+y-3) = -2

  

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