Tìm x
X – 5/9 = 9/5
X – 2/5 = 3
X – 7/12 = 5/4
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x-5/9=9/5x=9/5+5/9x=81/45+25/45x=106/45____________________________x-2/5=3x=3+2/5x=15/5+2/5x=17/5________________________________________x-7/12=5/4x=5/4+7/12x=15/12+7/12x=11/6
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x – 5/9 = 9/5x = 9/5 + 5/9x = 81/45 + 25/45x = 106/45Vậy x = 106/45_______________________x – 2/5 = 3x = 3 + 2/5x = 15/5 + 2/5x = 17/5Vậy x = 17/5_______________________x – 7/12 = 5/4x = 5/4 + 7/12x = 15/12 + 7/12x = 11/6Vậy x = 11/6