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Thanh Nguyễn
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2023-10-11 12:18:09
(-8/9 +7/5 - 2/11) - (-2/5-17/9-13/11)
=-8/9 +7/5 - 2/11 +2/5 +17/9 +13/11
=(-8/9 + 17/9) +(7/5+2/5) (-2/11+13/11)
=11/9 + 9/5 + 1
= 55/45 + 81/45 +45/45
=181/45
2023-10-11 12:04:20
221:3=73 (dư=2)
2023-10-11 11:45:23
75-x=16
x=75-16
x=59
vậy x=59