標題:
98 MATH MC
發問:
X=Y(Z-3)/3Z ,,則Z=? 答案係-3Y/3X-Y 我想知解釋!!!! 數學唔好....最好有埋步驟...PLZ!!!
最佳解答:
其他解答:
when we need to find the unknown, we usually don't want the denominator, so we times the denominator both sides: X(3Z)=[Y(Z-3)/3Z](3Z) 3XZ=Y(Z-3) now the denominator has gone. next, we want to find Z, so we should isolate the Z, so we need to make the terms with Z in the level(a "Z" is in the blanket) 3XZ=YZ-3Y then isolate the Z (put the Z terms on one side, and others on other side) 3XZ-YZ=-3Y factorization (3X-Y)Z=-3Y i think you can do the final step
98 MATH MC
發問:
X=Y(Z-3)/3Z ,,則Z=? 答案係-3Y/3X-Y 我想知解釋!!!! 數學唔好....最好有埋步驟...PLZ!!!
最佳解答:
此文章來自奇摩知識+如有不便請留言告知
其實好簡單,首先 X=Y(Z-3)/3Z 1.３ＺＸ＝Ｙ（Ｚ－３） 2.３ＺＸ＝ＹＺ－３Ｙ 3.３ＺＸ－ＹＺ＝－３Ｙ 4.Ｚ（３Ｘ－Ｙ）＝－３Ｙ（因式分解） 5.Ｚ＝－３Ｙ／３Ｘ－Ｙ 唔明可以提出。其他解答:
when we need to find the unknown, we usually don't want the denominator, so we times the denominator both sides: X(3Z)=[Y(Z-3)/3Z](3Z) 3XZ=Y(Z-3) now the denominator has gone. next, we want to find Z, so we should isolate the Z, so we need to make the terms with Z in the level(a "Z" is in the blanket) 3XZ=YZ-3Y then isolate the Z (put the Z terms on one side, and others on other side) 3XZ-YZ=-3Y factorization (3X-Y)Z=-3Y i think you can do the final step
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