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2007-07-17 11:28 pm
2(x-4)/-3(x+3)=-3

回答 (5)

2007-07-17 11:33 pm
✔ 最佳答案
首先,兩邊乘 -3(x+3),得到:
2(x - 4) = 9(x + 3)

跟住,拆括號,
2x - 8 = 9x + 27

然後兩邊減 2x ,兩邊 - 27,
-35 = 7x

最後,兩邊除 7 ,將 x 寫番在左手邊,
x = -5
2007-07-18 12:35 am
2(x-4)/-3(x+3)=-3
2x-8/-3x-9=-3
2x-8=-3(-3x-9)
2x-8=9x+27
2x=9x+35
2x-9x=35
-7x=35
x=-5
2007-07-17 11:42 pm
2(x-4)/-3(x+3)=-3
2x-8=9(x+3)
2x-8=9x+27
2x-9x=27+8
-7x=35
x=-5
2007-07-17 11:37 pm
2(x-4)/-3(x+3)=-3
(2x-8)/(-3x-9)=-3
2x-8=-3*(-3x-9)
2x-8=9x+27
2x-9x=27+8
-7x=35
x=-5
參考: 自己
2007-07-17 11:36 pm
2(x-4)=9(x+3)
2x-8 =9x+27
(-8)-27=9x-2x
-35 =7x
x=-5


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