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設大盒x個,小盒y個,根據題意可得方程: 11x+8y=89,方程可以變形為:x= 89-8y /11 因為x、y都是整數,所以89-8y必須是11的倍數, 所以,只有當x=3,y=7,是這個方程的整數解, 答:大盒3個,小盒7個.
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