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Duo.exe
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0
2022-11-10 19:45:59
9x -20 = 5 mũ 5 : 5 mũ 3
9x - 20 = 5 mũ 5 * 5 mũ trừ 3
9x - 20= 5 mũ 2
9x - 20=25
9x = 25 +20
9x=45
x = 5
2022-11-09 21:16:09