簡易方程~~~~唔該幫忙

2007-07-21 3:28 am
1) 6/1(27-3x)=6

2) 5(+2) 3(3x+8)
-------- = -----------
9 18


請問如何解這兩條方程?plx 詳細>___

回答 (3)

2007-07-21 4:13 am
✔ 最佳答案
1) 6/1(27-3x)=6

1)兩邊都x6,即(27-3x)=36
-3x=36-27
-3x=9
x=-3

2) 5(+2) 3(3x+8)
----------- = --------------
9 18
同樣兩邊x18,即2(5(+2))=3(3x+8)
20=9x+24
-9x=24-20
-9x=4
x=-4/9
2007-07-22 6:21 am
1) 6/1 =1除6 (1/6)?!
  6/1(27-3x)=6
   27-3x=6/(6/1)
   27-3x=36
   27-36=-3x
    3x=9
     x=3
2)
 5(+2)  3(3x+8)
 -------- = -----------
  9    18
2(5(+2))   3(3x+8)
------------ = -----------
  18    18
  20 = 9x+24
  -9x =24-20
   9x=-4
   x =-4/9
2007-07-21 3:33 am
3x=1+27

x=28/3

x=9.3
參考: me


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