Solving Eq. by Sub. IV
  • 1. x+3y=1 -3x-3y=-15
  • 2. -3x-8y=20 -5x+y=19
  • 3. -3x+3y=4 -x+y=3
  • 4. -3x+3y=3 -5x+y=13
  • 5. 6x+6y=-6 5x+y=-13
  • 6. 2x+y=20 6x-5y=12
  • 7. -3x-4y=2 3x+3y=-3
  • 8. -2x+6y=6 -7x+8y=-5
  • 9. -5x-8y=17 2x-7y=-17
  • 10. -2x-y=-9 5x-2y=18
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