各位知識朋友 , 入黎幫我手 ar !!!
我有幾條數學問題唔識 , 幫手解答 ar( 數學F.1 )!!!!!!!!!!!!!!! (要步驟)
1.
-x-2 = 6(x - 5)
2.
-3(x - 1) = -2x - 2
3.
4(2x - 3) - 8 = 7 - 2(3x - 4)
--超趕 , 40 marks -- 各位知識朋友 , 入黎幫我手 ar !!! ( 數學F.1 ) (58)
2008-05-25 2:30 am
回答 (3)
2008-05-25 2:44 am
✔ 最佳答案
1.-x-2 = 6(x - 5)
-x-2 = 6x-30
7x = 28
x = 4
2.
-3(x - 1) = -2x - 2
-3x + 3 = -2x - 2
x = 5
3.
4(2x - 3) - 8 = 7 - 2(3x - 4)
8x - 12 - 8 = 7 - 6x + 8
8x - 20 = 15 - 6x
14x = 35
x = 5/2
參考: 自己計..
2008-05-25 2:48 am
1.
-x-2 = 6(x - 5)
-x-2 =6x-30
-x-6x=-30+2
-7x=-28
x=4
2.
-3(x-1)=-2x-2
-3x+3=-2x-2
-3x+2x=-2-3
-x=-5
x=5
3.
4(2x-3)-8=7-2(3x-4)
8x-12-8=7-6x+8
8x-20=15-6x
8x+6x=15+20
14x=45
x=45/14
Hope this can help you!
-x-2 = 6(x - 5)
-x-2 =6x-30
-x-6x=-30+2
-7x=-28
x=4
2.
-3(x-1)=-2x-2
-3x+3=-2x-2
-3x+2x=-2-3
-x=-5
x=5
3.
4(2x-3)-8=7-2(3x-4)
8x-12-8=7-6x+8
8x-20=15-6x
8x+6x=15+20
14x=45
x=45/14
Hope this can help you!
參考: my own knowledge
2008-05-25 2:43 am
1.
-x-2 = 6(x - 5)
-x-2=6x-30
7x=28
x=4
2.
-3(x - 1) = -2x - 2
-3x+3=-2x-2
x=5
3.
4(2x - 3) - 8 = 7 - 2(3x - 4)
8x-12-8=7-6x+8
14x=35
x=35/14
x=5/2
x=2.5
-x-2 = 6(x - 5)
-x-2=6x-30
7x=28
x=4
2.
-3(x - 1) = -2x - 2
-3x+3=-2x-2
x=5
3.
4(2x - 3) - 8 = 7 - 2(3x - 4)
8x-12-8=7-6x+8
14x=35
x=35/14
x=5/2
x=2.5
收錄日期: 2021-04-23 20:37:49
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