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  • 2x+3y=19 / 5x+4y=30
    x=2 , y=5
  • -3x+9y=36 / 7x-8y=-19
    x=3 , y=5
  • 6x+y=-8 / -4x-5y=-12
    x=-2 , y=4
  • 12x-9y=-5 / 4x-3y=11
    no unique solution
  • 2x+3y=5 / 4 𝑥 − 𝑦 = 3
    x=1 , y=1
  • what is Cramer's rule ?
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