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Yahoo!奇摩知識+ - 分類問答 - 科學常識 - 發問中
Yahoo!奇摩知識+ - 分類問答 - 科學常識 - 發問中
這樣怎麼算呢請數學高手告訴我
Jun 2nd 2013, 18:39

哈囉～

慢慢一步一步算是這樣～
  
5x+5x+1=10x+10x+1
先x全部加起來 
=> 10x+1=20x+1
先把20x消除 
=> 1+(10x-20x)=1+(20x-20x)    
消除後變成
=> 1+(-10x)=1 
把括號消除
=> 1-10x=1
把1移到同一邊
=> -10x=1-1
因為1-1=0, 所以
=> -10x=0
這裡求x是什麼所以兩邊都除-10
=> -10x/10=0/-10
因為-10/-10=1
=> x=0/-10
分子式0什麼數字都是0
所以答案x=0   

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