我唔識點計呢條數,,有冇人可以幫我??急!!!!!! thx~~~~~~
回答 (2)
2007-09-14 4:31 am
✔ 最佳答案
1/3(x+9) = 1/3-0.5(x+3) 〔全式乘6，冇左小數或者分數就會易計〕1/3(x+9)x6 = [1/3-0.5(x+3)]x6
2(x+9) = 2-3(x+3)
2x+18 = 2-3x-9
2x+3x = 2-9-18
5x = -25
x = -5
2007-09-14 4:45 am
1/3(x+9)=1/3-0.5(x+3) <------全部 x6
2(6x+54) = 2-3(6x+18)
12x+108 = 2-18x-54
30x+160 = 0
30x = -160
x = -5.33 (3,s,f )
2(6x+54) = 2-3(6x+18)
12x+108 = 2-18x-54
30x+160 = 0
30x = -160
x = -5.33 (3,s,f )
收錄日期: 2021-04-13 13:27:47
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070913000051KK03272