b2007bratz b2007bratz
  • 23-10-2020
  • Mathematics
contestada

2x+y-z=7
x-2y+2z=-9
3x-y+z=5

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rebeca1729
rebeca1729 rebeca1729
  • 23-10-2020
3x-y+5=15y because 3x5=15
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