16.已知m,x,y滿足:①②:是同類項(xiàng),求代數(shù)式的值。

答案:250

解析:因?yàn)?img src="data:image/png;base64,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">,所以x=5,m=0.

      因?yàn)?img src="data:image/png;base64,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">與是同類項(xiàng),所以y+1=3,y=2

化簡(jiǎn)求得原式=,

把x,y,m代入式子求得:原式=

                           =250

  

 


題目來源:2015長(zhǎng)江作業(yè)本同步練習(xí)冊(cè)七年級(jí)數(shù)學(xué)上冊(cè)人教版 > 2.2 整式的加減(二)

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