數學方程式27題(超急)要詳細計算

2010-08-18 8:57 pm
1. 24-3x=18
2. 5x/4 -6=11(斜線是分線)
3. 9y-19=5y-11
4. 4x+2(x+4)-4=5x+4
5. 9(x+1)+2(x+3)=10(x+2)
6. (2y-1)+5(y+1)=25
7. x/6 = x+3/15 (斜線是分線)
8. 5(x+1)/6 -2 =3(斜線是分線)
9. x+8/6 +5=7(斜線是分線)
10. 1+ 3(a-2)/4 =7(斜線是分線)
11. 2(x+3)/6 +4=7(斜線是分線)
12. 6x -1/7 +4=9(斜線是分線)
13. 3(2x -5)/5 +4=7(斜線是分線)
14. 6x -2/4 +1 =5(斜線是分線)
15. 5x -3/7 -4=2(斜線是分線)
16. 3+ x-9/2 =5(斜線是分線)
17. 8+ 2x/6 -7=4(斜線是分線)
18. x/3 +4=x(斜線是分線)
19. 2x -6/4 -7=4(斜線是分線)
20. 3/2 (x+1)=9(斜線是分線)
21. 2/5(3y -8)=4
22. 4(13x-11)/3 -9=11(斜線是分線)
23. 2(8x+6)/11 +3 =7(斜線是分線)
24. 7/4(5x -3) =21(斜線是分線)
25. 8(9x +10)/11 =40(斜線是分線)
26. 5-2x/6 + 1/2 =1(斜線是分線)
27. 10/3 + 15+x/4 (斜線是分線)

回答 (5)

2010-08-18 9:33 pm
✔ 最佳答案
too much!!

2010-08-18 13:12:24 補充:
每次9題,分3次出都還可以,請不要一次過出27題,還要只給1天,簡直是impossible。

2010-08-18 13:33:22 補充:
1. 24-3x=18
解:24-3x=18
3x=6
x=2

2. 5x/4 -6=11(斜線是分線)
解:5x/4 -6=11
5x-24=44
5x=68
x=13.6

3. 9y-19=5y-11
解:9y-19=5y-11
4y=8
y=2

4. 4x+2(x+4)-4=5x+4
解:4x+2(x+4)-4=5x+4
4x+2x+8-4=5x+4
6x+4=5x+4
6x=5x
x=0

5. 9(x+1)+2(x+3)=10(x+2)
解:9(x+1)+2(x+3)=10(x+2)
9x+9+2x+6=10x+20
11x+15=10x+20
x=5

6. (2y-1)+5(y+1)=25
解:(2y-1)+5(y+1)=25
2y-1+5y+5=25
7y+4=25
7y=21
y=3

7. x/6 = x+3/15 (斜線是分線)
解:x/6 = x+3/15
5x=2(x+3)
5x=2x+6
3x=6
x=2

8. 5(x+1)/6 -2 =3(斜線是分線)
解:5(x+1)/6 -2 =3
5(x+1)-12=18
5x+5=30
5x=25
x=5

9. x+8/6 +5=7(斜線是分線)
解: x+8/6 +5=7
x+8+30=42
x=4

10. 1+ 3(a-2)/4 =7(斜線是分線)
解:1+3(a-2)/4 =7
4+3(a-2)=28
3a-6=24
3a=30
a=10

11. 2(x+3)/6 +4=7(斜線是分線)
解:2(x+3)/6 +4=7
2(x+3)+24=42
2x+6+24=42
2x=12
x=6

12. 6x -1/7 +4=9(斜線是分線)
解:6x -1/7 +4=9
42x-1+28=63
42x=36
x=6/7

13. 3(2x -5)/5 +4=7(斜線是分線)
解:3(2x -5)/5 +4=7
3(2x-5)+20=35
6x-15+20=35
6x=30
x=5

14. 6x -2/4 +1 =5(斜線是分線)
解:6x -2/4 +1 =5
12x-1+2=10
12x=9
x=3/4

15. 5x -3/7 -4=2(斜線是分線)
解:5x -3/7 -4=2
35x-3-28=14
35x=45
x=9/7

16. 3+ x-9/2 =5(斜線是分線)
解:3+ x-9/2 =5
6+x-9=10
x=13

17. 8+ 2x/6 -7=4(斜線是分線)
解:8+ 2x/6 -7=4
48+2x-42=24
2x=18
x=9

18. x/3 +4=x(斜線是分線)
解:x/3 +4=x
x+12=3x
2x=12
x=6



2010-08-18 13:37:37 補充:
19. 2x -6/4 -7=4(斜線是分線)
解:2x -6/4 -7=4
8x-6-28=16
8x=50
x=25/4

20. 3/2 (x+1)=9(斜線是分線)
解:3/2 (x+1)=9
3(x+1)=18
x+1=6
x=5

2010-08-18 13:38:42 補充:
21. 2/5(3y -8)=4
解:2/5(3y -8)=4
2(3y-8)=20
3y-8=10
3y=18
y=6

22. 4(13x-11)/3 -9=11(斜線是分線)
解:4(13x-11)/3 -9=11
12(13x-11)-27=33
12(13x-11)=60
13x-11=5
13x=16
x=16/13

2010-08-18 13:41:30 補充:
23. 2(8x+6)/11 +3 =7(斜線是分線)
解:2(8x+6)/11 +3 =7
2(8x+6)+33=77
2(8x+6)=44
8x+6=22
8x=16
x=2

24. 7/4(5x -3) =21(斜線是分線)
解:7/4(5x -3) =21
7(5x-3)=84
5x-3=12
5x=15
x=3

2010-08-18 13:42:50 補充:
25. 8(9x +10)/11 =40(斜線是分線)
解:8(9x +10)/11 =40
(9x+10)/11=5
9x+10=55
9x=45
x=5

26. 5-2x/6 + 1/2 =1(斜線是分線)
解:5-2x/6 + 1/2 =1
5-2x+3=6
-2x=-2
x=1

2010-08-18 13:43:45 補充:
27. 10/3 + 15+x/4 (斜線是分線)
此題不是方程。

2010-08-18 13:45:03 補充:
回題主,本人已經盡了力,希望能夠幫到你,但第27題不是方程式,你有沒有打錯呢?

2010-08-18 18:25:11 補充:
第22題更正:
22. 4(13x-11)/3 -9=11(斜線是分線)
解:4(13x-11)/3 -9=11
4(13x-11)-27=33
4(13x-11)=60
13x-11=15
13x=26
x=2
參考: 下面繼續......, 希望可 以幫到你
2010-08-18 10:01 pm
1. 24-3x=18
 -3x=-6
 x=2

2. 5x/4 -6=11
 5x/4=17
 5x=68
 x=13.6

3. 9y-19=5y-11
 9y-5y=-11+19
 4y=8
 y=2

4. 4x+2(x+4)-4=5x+4
 4x+2x+8-4=5x+4
 6x-5x=4-8+4
 x=0

5. 9(x+1)+2(x+3)=10(x+2)
 9x+9+2x+6=10x+20
 11x-10x=20-9-6
 x=5
 
6. (2y-1)+5(y+1)=25
 2y-1+5y+5=25
 7y=25+1-5
 7y=21
 y=3

7. x/6 = x+3/15
 15x = 6(x+3)
 15x = 6x+18
 9x = 18
 x = 2

8. 5(x+1)/6 -2 =3
 (5x+5)/6 = 5
 5x+5 = 30
 5x = 25
 x = 5

9. x+8/6 +5=7
 (x+8)/6 = 2
 x+8 = 12
 x = 4
 
10. 1+ 3(a-2)/4 =7
 (3a-6)/4 = 6
 3a-6 = 24
 3a = 30
 a =10

11. 2(x+3)/6 +4=7
 (2x+6)/6 = 3
 2x+6 = 18
 2x =12
 x =6

12. 6x -1/7 +4=9
 (6x-1)/7 = 5
 6x-1 = 35
 6x = 36
 x = 6

13. 3(2x -5)/5 +4=7
 (6x-15)/5 = 3
 6x-15 = 15
 6x = 30
 x = 5

14. 6x -2/4 +1 =5
 (6x-2)/4 = 4
 6x-2 = 16
 6x = 18
 x = 3

15. 5x -3/7 -4=2
 (5x-3)/7 = 6
 5x-3 = 42
 5x = 45
 x = 9

16. 3+ x-9/2 =5
 (x-9)/2 =2
 x-9 = 4
 x = 13

17. 8+ 2x/6 -7=4
 2x/6 + 8 - 7 =4
 2x/6 = 3
 2x = 18
 x = 9

18. x/3 +4=x
 x/3 = x-4
 x = 3x-12
 12 = 2x
 x = 6

19. 2x -6/4 -7=4
 (2x-6)/4 =13
 2x-6 = 52
 2x =58
 x = 29

20. 3/2 (x+1)=9
 x+1 = 9(2/3)
 x+1 = 6
 x = 5

21. 2/5(3y -8)=4
 3y-8 = 4 (5/2)
 3y-8 = 10
 3y = 18
 y = 6

22. 4(13x-11)/3 -9=11
 (52x - 44)/3 = 20
 52x - 44 =60
 52x = 16
 x = 16/52 = 4/13

23. 2(8x+6)/11 +3 =7
 (16x+12)/11 = 4
 16x+12 = 44
 16x = 32
 x = 2

24. 7/4(5x -3) =21
 5x-3 = 21(4/7)
 5x-3 = 12
 5x = 15
 x = 3

25. 8(9x +10)/11 =40
 (72x+80)/11 = 40
 72x + 80 = 440
 72x = 360
 x = 5

26. 5-2x/6 + 1/2 =1
 (5-2x)/6 + 3/6 = 1
 (8-2x)/6 = 1
 8-2x = 6
 -2x = -2
 x = 1

27. 10/3 + 15+x/4 ←方程?
 =40/12 + (45+3x)/12
 =(85+3x)/12

其實有啲題目顯示得好模糊,你d分數好似:
21. 2/5(3y -8)=4 咁,都唔知係2除5(……)定係5分2乘(……)。
我估計你嘅程度呢答題。

2010-08-18 14:03:56 補充:
第22題改正:

22. 4(13x-11)/3 -9=11
 (52x - 44)/3 = 20
 52x - 44 =60
 52x = 104    ←
 x = 2
2010-08-18 9:44 pm
To 001 and 002,
你地甘有耐性.................
2010-08-18 9:41 pm
1. 24-3x=18
3x = 6
x = 2
2. 5x/4 -6=11(斜線是分線)
5x/4 = 17
5x = 68
x = 68/5
3. 9y-19=5y-11
4y = 8
y = 2
4. 4x+2(x+4)-4=5x+4
4x + 8x + 8 - 4 = 5x + 4
7x = 0
x = 0
5. 9(x+1)+2(x+3)=10(x+2)
9x + 9 + 2x + 6 = 10x + 20
x = 5
6. (2y-1)+5(y+1)=25
2y - 1 + 5y + 5 = 25
7y = 21
y = 3
7. x/6 = x+3/15 (斜線是分線)
5x = 2x+6
3x = 6
x = 2
8. 5(x+1)/6 -2 =3(斜線是分線)
5x+5 = 30
5x = 25
x = 5
9. x+8/6 +5=7(斜線是分線)
x+8 = 12
x = 4
10. 1+ 3(a-2)/4 =7(斜線是分線)
3a-6 = 24
3a = 30
a = 10
11. 2(x+3)/6 +4=7(斜線是分線)
2x+6 = 18
2x = 12
x = 6
12. 6x -1/7 +4=9(斜線是分線)
6x = 36/7
x = 6/7
13. 3(2x -5)/5 +4=7(斜線是分線)
6x - 30 = 15
6x = 45
x = 15/2
14. 6x -2/4 +1 =5(斜線是分線)
6x = 18/4
x = 3/4
15. 5x -3/7 -4=2(斜線是分線)
5x = 45/7
x = 9/7
16. 3+ x-9/2 =5(斜線是分線)
x-9 = 4
x = 13
17. 8+ 2x/6 -7=4(斜線是分線)
2x = 18
x = 9
18. x/3 +4=x(斜線是分線)
x + 12 = 3x
2x = 12
x = 6
19. 2x -6/4 -7=4(斜線是分線)
2x = 50/4
x = 25/4
20. 3/2 (x+1)=9(斜線是分線)
(x+1)/2 = 3
x+1 = 6
x = 5
21. 2/5(3y -8)=4
1/(15y-40) = 2
1 = 30y - 80
30y = 81
y = 27/10
22. 4(13x-11)/3 -9=11(斜線是分線)
52x-44 = 60
52x = 104
x = 2
23. 2(8x+6)/11 +3 =7(斜線是分線)
16x + 12 = 44
16x = 32
x = 2
24. 7/4(5x -3) =21(斜線是分線)
1/(20x-12) = 3
1 = 60x - 36
60x = 37
x = 37/60
25. 8(9x +10)/11 =40(斜線是分線)
72x + 80 = 440
72x = 360
x = 5
26. 5-2x/6 + 1/2 =1(斜線是分線)
5-2x = 3
2 = 2x
x = 1
27. 10/3 + 15+x/4 (斜線是分線) =????


2010-08-18 13:48:46 補充:
呵呵~今次當是練練心算~_~
當中若有錯漏請勿見怪^^"
參考: Hope the solution can help you^^”
2010-08-18 9:24 pm
sorry,因為明天要交了

2010-08-18 22:19:05 補充:
真係多謝唒!^~^thank~


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