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If 8x+3y+z =7 7x-3y+6z = 9 5x+y-2z = -14 find the value of z correct to four decimal places If 8x+3y+z = 7 7x-3y+6z =

If 8x+3y+z =7 7x-3y+6z = 9 5x+y-2z = -14 find the value of z correct to four decimal places

If 8x+3y+z = 7 7x-3y+6z = 9 5x+y-2z = -14 find the value of z correct to four decimal places.

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