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解题,联立二元一次方程代入消元法和加减消元法都行.要完整列式Threeyearsago.thefather'sagewas8timestheson'sage.Twoyearslater,thefather'sagewiibe4.5timestheson'sage.Findthepresentagesofthefatherand
解题,联立二元一次方程代入消元法和加减消元法都行.要完整列式
Threeyearsago.thefather'sagewas8timestheson'sage.Twoyearslater,thefather'sagewiibe4.5timestheson'sage.Findthepresentagesofthefatherandtheson.
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2020-09-26 14:24