唔該比埋步驟T_T
1.
5 [ 3 ( 3 x - 8 ) - 1 ] = [ 3 ( x + 1 ) - ( 5 - x ) ]
2.
4 ( y - 5 ) - 5分之3y = 5分之2
3.
3分之y = 5 - 4 ( y - 2分之1 )
4.
2分之y = 9 - 8 ( y - 4分之3 )
5.
2又3分之1 - 5 ( y -5分之2 ) = 3分之2y
6.
3又2分之1 - 6 ( 3分之1 + y ) = 2分之y
數學高手help me please T_T
2008-11-02 9:48 pm
回答 (2)
2008-11-02 11:11 pm
✔ 最佳答案
1. 5[3(3x-8)-1]=3(x+1)-(5-x)5[9x-24-1] = 3x+3 - 5+x
45x - 125 = 4x - 2
41x = 123
x = 3
2. 4(y-5) - 3y/5 = 2/5
20y-100 - 3y =2
17y=102
y = 6
3. y/3 = 5 - 4(y-1/2)
y = 15 - 12y + 6
13y = 21
y = 21/13
4. y/2 = 9 - 8(y- 3/4)
y = 18 - 16y +12
17y = 30
y = 30/17
5. (2+1/3) - 5(y-2/5) = 2y/3
6+1-15y + 6 = 2y
17y = 13
y = 13/17
6. (3+1/2) - 6(1/3 + y) = y/2
6+1 - 4- 12y= y
13y = 3
y = 3/13
2008-11-02 11:59 pm
1.
5[3(3x-8)-1]=3(x+1)-(5-x)
5[9x-24-1] = 3x+3 - 5+x
45x - 125 = 4x - 2
41x = 123
x = 3
2.
4(y-5) - 3y/5 = 2/5
20y-100 - 3y =2
17y=102
y = 6
3.
y/3 = 5 - 4(y-1/2)
y = 15 - 12y + 6
13y = 21
y = 21/13
4.
y/2 = 9 - 8(y- 3/4)
y = 18 - 16y +12
17y = 30
y = 30/17
5.
(2+1/3) - 5(y-2/5) = 2y/3
6+1-15y + 6 = 2y
17y = 13
y = 13/17
6.
(3+1/2) - 6(1/3 + y) = y/2
6+1 - 4- 12y= y
13y = 3
y = 3/13
Hope I can help you.
5[3(3x-8)-1]=3(x+1)-(5-x)
5[9x-24-1] = 3x+3 - 5+x
45x - 125 = 4x - 2
41x = 123
x = 3
2.
4(y-5) - 3y/5 = 2/5
20y-100 - 3y =2
17y=102
y = 6
3.
y/3 = 5 - 4(y-1/2)
y = 15 - 12y + 6
13y = 21
y = 21/13
4.
y/2 = 9 - 8(y- 3/4)
y = 18 - 16y +12
17y = 30
y = 30/17
5.
(2+1/3) - 5(y-2/5) = 2y/3
6+1-15y + 6 = 2y
17y = 13
y = 13/17
6.
(3+1/2) - 6(1/3 + y) = y/2
6+1 - 4- 12y= y
13y = 3
y = 3/13
Hope I can help you.
參考: my maths knowledge
收錄日期: 2021-04-19 20:38:45
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