若4a4xb3与-3a2b2x+y的和还是单项式,则x+y=______.
题型:填空题难度:一般来源:不详
若4a4xb3与-3a2b2x+y的和还是单项式,则x+y=______. |
答案
由题意知,4a4xb3与-3a2b2x+y是同类项, 根据同类项的定义,4x=2,2x+y=3, 解得x=,y=2, 所以x+y=. |
举一反三
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