4x - 2y + 5x怎样化简?
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4x - 2y + 5x怎样化简?
4x - 2y + 5x怎样化简?
4x - 2y + 5x怎样化简?
4x - 2y + 5x
=(4+5)x-2y
=9x-2y
合并同类项:9x-2y
4x - 2y + 5x=9x-2y
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9X-2y
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