國中數學能力測試
Dictionary.com - Free Online English Dictionary已知:媽媽比小孩大21歲,6年之後媽媽的年齡是小孩年齡的5倍。請問:爸爸現在在哪裡?(不要這麼快看解答嘛~~~~先用國中學過的數學計算一下ㄚ!)參考解答:假設媽媽是M歲,小孩是C歲。M=C+21M+6=(C+6)X5解聯立方程式:M=C+21M+6=(C+6)X5>>M+6=5C+30>>M=5C+The world's most popular dictionary and thesaurus with definitions, synonyms, antonyms, idioms, word origins, quotes, audio pronunciations, example sentences and Word of the Day! Look up the meaning of words, slang, phrases, idioms, and abbreviations in o...
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