化简|X-3|+(x-3)化简|X-3|+(X-3)

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化简|X-3|+(x-3)化简|X-3|+(X-3)
化简|X-3|+(x-3)
化简|X-3|+(X-3)

化简|X-3|+(x-3)化简|X-3|+(X-3)
化简|X-3|+(x-3)
①x≥3时,原式=(x-3)+(x-3)
=2x-6
②x﹤3时,原式=-(x-3)+(x-3)
=0