5(x+2)除9=3(3x+8)除18
e d 咩x=x 既方進式我唔係好識做 希望可以搵人教下我 我唔係要條式係要知點知
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2006-10-22 2:29 am
回答 (3)
2006-10-22 2:48 am
✔ 最佳答案
5(x + 2) / 9 = 3 (3x + 8) /185(x + 2)/9*18 = 3(3x + 8)/18*18 .(always get the LCM of the 分母 and multiply it to all)
5(x + 2) *2 = 3 (3x + 8)
10x + 20 + 9x + 24
10x - 9x = 24 - 20
x = 4
2006-10-21 19:01:53 補充：
- 你去消失左 d 分母之後, 條數就會易計好多架喇.(希望可以幫到你.)
2006-10-22 3:46 am
5(x+2) / 9 = 3(3x+8) /18
2(5x+10) = 9x+24
10x+20 = 9x +24
10x-9x = 24-20
x=4
2(5x+10) = 9x+24
10x+20 = 9x +24
10x-9x = 24-20
x=4
2006-10-22 2:35 am
5(x+2)/9=3(3x+8)/18
90x+180=81x+216
11x=36
x=36/11
2006-10-21 18:36:42 補充：
ok^^?
90x+180=81x+216
11x=36
x=36/11
2006-10-21 18:36:42 補充：
ok^^?
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061021000051KK04243