我唔識呢題
7(x-1)-5(2-x)=3
有冇人教我中一的方程呀
2007-08-28 9:46 pm
回答 (3)
2007-08-28 9:53 pm
✔ 最佳答案
7(x-1)-5(2-x)=3 (7x-7)-(10-5x)=3
7x-7-10+5x=3
12x-17=3
12x=20
2
x=1-----
3
2007-08-28 13:55:07 補充：
x係=一又三分之二 ． 又= １．６
2007-08-28 13:56:00 補充：
． 又= １．６
2007-08-28 13:56:46 補充：
如需解釋，你可以問返我嫁=]
參考: ME
2007-08-28 10:17 pm
7(x-1)-5(2-x) =3
7x-7-10+x =3
7x+x =3 +7+10
8x =20
8x / 8 =20/8
x =5 份 2
2____
5
又話者你可以話係 0.4
2007-08-30 21:32:10 補充：
唔該...
你個答案都錯既...
咁都係 best ans
7x-7-10+x =3
7x+x =3 +7+10
8x =20
8x / 8 =20/8
x =5 份 2
2____
5
又話者你可以話係 0.4
2007-08-30 21:32:10 補充：
唔該...
你個答案都錯既...
咁都係 best ans
參考: 我自己~
2007-08-28 10:02 pm
7(x-1) - 5(2-x) = 3
7x-7-10+5x = 3
-17+12x = 3
12x = 20
x = 5/3
= 1/2/3
7x-7-10+5x = 3
-17+12x = 3
12x = 20
x = 5/3
= 1/2/3
收錄日期: 2021-04-13 14:03:46
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https://hk.answers.yahoo.com/question/index?qid=20070828000051KK02317