中一數學題~~(急~~)

2008-11-21 2:51 am
solve the following equations,列式,thx~



1. x除5減2x除15 = 3





2.6[2(2-y)-3y] = 24

回答 (4)

2008-11-21 9:25 pm
✔ 最佳答案
1. x除5減2x除15 = 3
x/5-2x/15=3
3x-2x=45......................一齊乘15
x=45


2.6[2(2-y)-3y] = 24
2(2-y)-3y =4
4-2y-3y = 4
4-5y = 4
5y=0
y=0
參考: 會考數學拿c既人~
2008-11-21 3:20 am
1.
x除5減2x除15 = 3
x/5 - 2x/15 =3
3x/15-2x/15=3
x/15=3
x=45


2.
6[2(2-y)-3y] = 24
6[4-2y-3y] = 24
24-12y-18y = 24
24-30y=24
-30y=0
y=30
參考: 自己 Of myself
2008-11-21 3:02 am
1 X/5-2x/15=3
  3x-2x=45
  x=45
2 6(4-2y-3y)=24
  6(4-5y)=24
24-5y=24
-5y=0
y=0
參考: myself
2008-11-21 2:59 am
1.
x除5減2x除15 = 3
x/5 - 2x/15 =3
3x/15-2x/15=3
x/15=3
x=45


2.
6[2(2-y)-3y] = 24
6[4-2y-3y] = 24
24-12y-18y = 24
24-30y=24
-30y=0
y=30
參考: 自己


收錄日期: 2021-04-26 17:07:39
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