kush8408 kush8408
  • 21-08-2020
  • Mathematics
contestada

X+y+z=1
X-2y+3z=2
X+z-5=0

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khalidtauhid9 khalidtauhid9
  • 21-08-2020

x+y+z=1

x=1/(y+z)

1/(y+z)-2y+3z=2  

1-2y²-2yz+3yz+3z²=2(y+z)

(1-2y²+yz+3z²)/2=y+z

z=(1-2y²+yz+3z²)/2 -y/1

z=(1-2y²+yz+3z²-2y)/2

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