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x-6y-3z =-28 ...(2)
3x+2y+z =16 ...(3)
2x-2y-2z =9 ...(1)
x-6y-3z =-28 ...(2) -
10y+4z = 65 ...(3)
x-6y-3z =-28 ...(2)
3x+2y+z =16 ...(3) -
-20y -10z =-100 ...(4)
10y+4z = 65 ...(3)
-20y -10z =-100 ...(4) -
-2z = 30
z= -15
-20y - 10 (-15) = 100
-20y = 100-150
y= 50/20 = 2,5
2x-2y-2z =9
2x -2 (2.5) - 2 ( -15)= 9
2x = 9 +5 -30
x = -16/2 = -8