a. 2x+8(3x-5)=12
b. 5(x-2)-3(6x-8)=5
如果可以請列式 , 十分感謝
2x+8(3x-5)=12 及仲有條數唔識
2007-03-17 7:48 pm
回答 (12)
2007-03-17 7:58 pm
✔ 最佳答案
a.2x+8(3x-5)=122x+24x-40=12
26x-40=12
26x=12+40
26x=52
x=52/26
x=2
b.5(x-2)-3(6x-8)=5
5x-10-18x+24=5
-13x+14=5
-13x=5-14
-13x=-9
x=9/13
參考: me
2007-03-18 4:55 pm
2x+8(3x-5)=12
2x+24x-40=12
26x=52
x=2
5(x-2)-3(6x-8)=5
(5x-10)-(18x-24)=5
5x-10-18x+24=5
-13x= -9
x=9/13
2x+24x-40=12
26x=52
x=2
5(x-2)-3(6x-8)=5
(5x-10)-(18x-24)=5
5x-10-18x+24=5
-13x= -9
x=9/13
2007-03-17 8:35 pm
a. 2x+8(3x-5)=12
2x+24x-40=12
26x-40+40=12+40
26x÷26=52÷26
x=2
b. 5(x-2)-3(6x-8)=5
5x-10-18x+24=5
-13x+14-14=5-14
-13x=-9
x=13分之9
2x+24x-40=12
26x-40+40=12+40
26x÷26=52÷26
x=2
b. 5(x-2)-3(6x-8)=5
5x-10-18x+24=5
-13x+14-14=5-14
-13x=-9
x=13分之9
2007-03-17 8:07 pm
a.
2x+8(3x-5)=12
3x+8-5=12÷2x
3x+3=6÷x
3x+3x=6
6x=6
x=1
b. 5(x-2)-3(6x-8)=5
5x-10-18x-24=5
5x-18x=39
-18x=39-5x
18x=39+5x
18x-5x=39
13x=39
x=3
2007-03-17 15:10:03 補充：
唔好意思= =a. 2x 8(3x-5)=12 2x 24x-40=12 26x=52 x=52÷26 x=2b. 5(x-2)-3(6x-8)=5 5x-10-18x 24=5 -13x=-9 x=9÷13
2x+8(3x-5)=12
3x+8-5=12÷2x
3x+3=6÷x
3x+3x=6
6x=6
x=1
b. 5(x-2)-3(6x-8)=5
5x-10-18x-24=5
5x-18x=39
-18x=39-5x
18x=39+5x
18x-5x=39
13x=39
x=3
2007-03-17 15:10:03 補充：
唔好意思= =a. 2x 8(3x-5)=12 2x 24x-40=12 26x=52 x=52÷26 x=2b. 5(x-2)-3(6x-8)=5 5x-10-18x 24=5 -13x=-9 x=9÷13
2007-03-17 8:03 pm
a. 2x+8(3x-5)=12
2x+24x-40=12
26x=12+40
26x=52
x=2
b. 5(x-2)-3(6x-8)=5
5x-10-(18x-24)=5
5x-10-18x+24=5
5x-18x=5-24+10
-13x=-9
9
x = -----
13
2007-03-17 12:04:42 補充：
9x = ----- 13
2x+24x-40=12
26x=12+40
26x=52
x=2
b. 5(x-2)-3(6x-8)=5
5x-10-(18x-24)=5
5x-10-18x+24=5
5x-18x=5-24+10
-13x=-9
9
x = -----
13
2007-03-17 12:04:42 補充：
9x = ----- 13
2007-03-17 8:00 pm
2x+8(3x-5)=12
2x+24x-40=12
26x-40=12
26x=52
x=2
------------------------------
5(x-2)-3(6x-8)=5
5x-10-18x+24=5
14-13x=5
9=13x
x=9/13
2x+24x-40=12
26x-40=12
26x=52
x=2
------------------------------
5(x-2)-3(6x-8)=5
5x-10-18x+24=5
14-13x=5
9=13x
x=9/13
參考: me
2007-03-17 7:59 pm
a. 2x+8(3x-5)=12
2x+24x-40=12
26x-40=12
26x=12+40
26x=52
x=52除26(分數形式比較好)
x=2
2007-03-17 12:01:38 補充：
等號要對齊呀~頭先手快快就禁左回答~漏左b題~sorry!b. 5(x-2)-3(6x-8)=5 5x-10-18x 24=5 -13x 14=5 13x 5=14 13x=14-5 13x=9 x=9除13(分數形式)
2x+24x-40=12
26x-40=12
26x=12+40
26x=52
x=52除26(分數形式比較好)
x=2
2007-03-17 12:01:38 補充：
等號要對齊呀~頭先手快快就禁左回答~漏左b題~sorry!b. 5(x-2)-3(6x-8)=5 5x-10-18x 24=5 -13x 14=5 13x 5=14 13x=14-5 13x=9 x=9除13(分數形式)
2007-03-17 7:58 pm
a. 2x+8(3x-5)=12
2x+24x-40=12
26x-40+40=12+40
26x=52
x=2
b. 5(x-2)-3(6x-8)=5
5x-10-18x+24=5
-13x-10+24+10-24=5+10-24
-13x=-9
x=9/13
2x+24x-40=12
26x-40+40=12+40
26x=52
x=2
b. 5(x-2)-3(6x-8)=5
5x-10-18x+24=5
-13x-10+24+10-24=5+10-24
-13x=-9
x=9/13
2007-03-17 7:56 pm
a)
2x+8(3x-5)=12
2x+8(3x)-8(5)=12
2x+24x-40=12
26x=52
x=52/26=2
b)
5(x-2)-3(6x-8)=5
5x-5(2)-3(6x)+3(8)=5
5x-10-18x+24=5
-13x=5-24+10
x=(-9)/(-13)=9/13
2x+8(3x-5)=12
2x+8(3x)-8(5)=12
2x+24x-40=12
26x=52
x=52/26=2
b)
5(x-2)-3(6x-8)=5
5x-5(2)-3(6x)+3(8)=5
5x-10-18x+24=5
-13x=5-24+10
x=(-9)/(-13)=9/13
2007-03-17 7:56 pm
a. 2x+8(3x-5)=12
2x(3x-5) + 8(3x-5) =12
6x2次方 - 10x + 24x - 40 =12
14x -40 + 6x2次方 =12
b. 5(x-2)-3(6x-8)=5
5x-10-18x+24 = 5
-13x +14 =5
要唔要計埋未知數??}
2x(3x-5) + 8(3x-5) =12
6x2次方 - 10x + 24x - 40 =12
14x -40 + 6x2次方 =12
b. 5(x-2)-3(6x-8)=5
5x-10-18x+24 = 5
-13x +14 =5
要唔要計埋未知數??}
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