Question 636578
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Hi,
6x-3y-z= -19                  {{{z = 6x-3y + 19}}}
<u>2x-2y+z= -15</u>
 8x-5y = -34

3x-y-z= -6
<u>2x-2y+z= -15</u>
 5x - 3y = -21     {{{y =(5/3)x + 7}}}

 8x-5y = -34
<u> 5x - 3y = -21</u>     ||Multiply 1st by 3, 2nd by 5 and subtracting 1st from 2nd to eliminate y
    x = -3  and y = 2   and  z = -5