1. 3(x+2)-2(3x-1)=20 = ?
2. 4(a-1)=3(a+3)-(a-9) = ?
3. 3(x-4)-5(x+1)=1-x = ?
Maths
2007-10-03 4:42 am
回答 (4)
2007-10-03 4:47 am
✔ 最佳答案
1.) 3(x+2)-2(3x-1)=203X + 6 -6X + 2 - 20 = 0
-3X - 12 = 0
X= -4
2) 4(a-1)=3(a+3)-(a-9)
4a - 4 = 3a+9-a+9
2a = 22
a = 11
3.) 3(x-4)-5(x+1)=1-x
3x -12-5x-5=1-x
-x = 18
x=-18
參考: me
2007-10-03 5:57 am
1. 3(x+2)-2(3x-1)=20
3x+6-6x+2=20
-3x+8=20
-3x=12
x= -4
2. 4(a-1)=3(a+3)-(a-9)
4a-4=3a+9-a+9
4a-4=2a+18
2a=22
a=11
3. 3(x-4)-5(x+1)=1-x
3x-12-5x-5=1-x
-2x-17=1-x
-x=18
x= -18
3x+6-6x+2=20
-3x+8=20
-3x=12
x= -4
2. 4(a-1)=3(a+3)-(a-9)
4a-4=3a+9-a+9
4a-4=2a+18
2a=22
a=11
3. 3(x-4)-5(x+1)=1-x
3x-12-5x-5=1-x
-2x-17=1-x
-x=18
x= -18
參考: myself
2007-10-03 5:40 am
1. 3x+6-6x+2=20
-3x=20-8
x=-4
2. 4a-4=3a+9-a+9
2a=22
a=11
3. 3x-12-5x-5=1-x
-x=18
x=-18
-3x=20-8
x=-4
2. 4a-4=3a+9-a+9
2a=22
a=11
3. 3x-12-5x-5=1-x
-x=18
x=-18
參考: me
2007-10-03 5:03 am
1. 3(x+2)-2(3x-1)=20
3x+6-6x+2=20
-3x+8=20
-3x=12
x=12/-3
x=-4
2. 4(a-1)=3(a+3)-(a-9)
4a-4=3a+9-a+9
4a-4=2a+18
2a=22
a=11
3. 3(x-4)-5(x+1)=1-x
3x-12-5x-5=1-x
-2x-17=1-x
- x-17=1
x=-18
2007-10-02 21:03:51 補充：
1. 3(x+2)-2(3x-1)=20 3x+6-6x+2=20 -3x+8=20 -3x=12 x=12/-3 x=-42. 4(a-1)=3(a+3)-(a-9) 4a-4=3a+9-a+9 4a-4=2a+18 2a=22 a=113. 3(x-4)-5(x+1)=1-x 3x-12-5x-5=1-x -2x-17=1-x - x-17=1 x=-18
3x+6-6x+2=20
-3x+8=20
-3x=12
x=12/-3
x=-4
2. 4(a-1)=3(a+3)-(a-9)
4a-4=3a+9-a+9
4a-4=2a+18
2a=22
a=11
3. 3(x-4)-5(x+1)=1-x
3x-12-5x-5=1-x
-2x-17=1-x
- x-17=1
x=-18
2007-10-02 21:03:51 補充：
1. 3(x+2)-2(3x-1)=20 3x+6-6x+2=20 -3x+8=20 -3x=12 x=12/-3 x=-42. 4(a-1)=3(a+3)-(a-9) 4a-4=3a+9-a+9 4a-4=2a+18 2a=22 a=113. 3(x-4)-5(x+1)=1-x 3x-12-5x-5=1-x -2x-17=1-x - x-17=1 x=-18
收錄日期: 2021-04-13 13:57:41
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https://hk.answers.yahoo.com/question/index?qid=20071002000051KK03620