28-10-2021
Mathematics

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a.2x=3y và x=y=10
B.4x=3y và x-y=11
C.3x=5y và x+y=30
D.-2x=5y và x+y=30
E.3x=4y và 2x+3y=34
F.4x=5y và 3x-2y=35

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28-10-2021

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