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Toán Lớp 7: | x-1 | = 3x+2 | 3x-1 | + 2 = x | x+7| – x = 7 | 7-2x | + 7 = 2x

Home/ Toán Lớp 7: | x-1 | = 3x+2 | 3x-1 | + 2 = x | x+7| – x = 7 | 7-2x | + 7 = 2x

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