14.x-6=(x-3)/4
22.1/9(h+9)=5/6-1/2(h+7)
maths(5)
2007-10-16 12:49 am
回答 (3)
2007-10-16 2:41 am
14.
x-6=(x-3)/4
4(x-6)=x-3
4x-24=x-3
4x-x=24-3
3x=21
x = 7
22.
1/9(h+9)=5/6-1/2(h+7)
(2h+18)/18 = 15/18 - (9h+63)/18
2h+18 = 15 - (9h+63)
2h+18 = -9h - 48
11h = -66
h = -6
x-6=(x-3)/4
4(x-6)=x-3
4x-24=x-3
4x-x=24-3
3x=21
x = 7
22.
1/9(h+9)=5/6-1/2(h+7)
(2h+18)/18 = 15/18 - (9h+63)/18
2h+18 = 15 - (9h+63)
2h+18 = -9h - 48
11h = -66
h = -6
2007-10-16 1:17 am
14.
x-6=(x-3)/4
4x-24=x-3
4x - x = -3+24
3x = 21
x = 7
22.
1/9(h+9)=5/6-1/2(h+7)
(2h+18)/18 = 15/18 - (9h+63)/18
2h+18 = 15 - (9h+63)
2h+18 = -9h - 48
11h = -66
h = -6
x-6=(x-3)/4
4x-24=x-3
4x - x = -3+24
3x = 21
x = 7
22.
1/9(h+9)=5/6-1/2(h+7)
(2h+18)/18 = 15/18 - (9h+63)/18
2h+18 = 15 - (9h+63)
2h+18 = -9h - 48
11h = -66
h = -6
2007-10-16 1:03 am
14. x-6=(x-3)/4
4(x-6)=4x-24=x-3
4x-x=24-3
3x=21
x=21/3=7
22. 1/9(h+9)=5/6-1/2(h+7)
(h+9)/9=5/6-3/6(h+7)=[5-3(h+7)]/6
6(h+9)=9(5-3h-21)
6h+54=45-27h-189
6h+27h=45-189-54
33h=-198
h=-198/33=-6
4(x-6)=4x-24=x-3
4x-x=24-3
3x=21
x=21/3=7
22. 1/9(h+9)=5/6-1/2(h+7)
(h+9)/9=5/6-3/6(h+7)=[5-3(h+7)]/6
6(h+9)=9(5-3h-21)
6h+54=45-27h-189
6h+27h=45-189-54
33h=-198
h=-198/33=-6
收錄日期: 2021-04-26 16:01:53
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071015000051KK01882