F.1 MATHS 唔識呀!!(20分)呀!!!

1.
4m+1/3=5/3-m/3
4m+m/3=5/3-1/3
m+m/3=1/3
2m=1
m=0.5

2.
4n-11-8n=22-n
4n-11-8n+n=22
4n-8n+n=22+11
-4n+n=33
-3n=33
n=-33/3
n=-11

3.
h-[2(h-1)+10]=5(h-34)
h-2(h-1)+10=5(h-34)
h-2h=5h-170-10+2
h-2h=5h-162
h-2h-5h=162
-6h=162
-h=27
h=-27

4.
s/3+s/7=-6
7s/21=3s/21=-6
10s/21=-6
s=-6*21/10
s=-12.6

1. 1/(4m+3)=5/3-1m/3
1/(4m+3)=(5-1m)/3
3=(4m+3)(5-1m)
4m(5-1m)+3(5-1m)=3
20m-4m^2+15-3m-3=0
-4m^2+17m+12=0

2. 4n-11-8n=22-n
-4n-11=22-n
-3n=33
n=-3

3. h-[2(h-1)+10]=5(h-34)
h-(2h-2+10)=5h-170
h-2h-8=5h-170
5h-h+2h=-8+170
6h=162
h=27

4. (s+1+7)/3=-6(s-1)
s+1+7=-18(s-1)
s+8=-18s+18
18s+s=18-8
19s=10
s=10/19

2006-11-04 11:28:56 補充：
2. 4n-11-8n=22-n-4n-11=22-n-3n=33n=-11

1 2 1
4m+ -- = 1--- _----- m
3 3 3
1 2 1
4m+----m=1-- _ ---
3 3 3
13 4
------m= -------
3 3
4
m= -------
13 //

2.
4n- 11-8n=22-n
4n-8n+n = 22+11
-3n = 33
n = -11//

3.
h-[2(h-1)+10]=5(h-34)
h-[2h-2+10] = 5h - 170
h- 2h-8 = 5h -170
h-2h-5h = -170+8
-6h = -162
h = 27//
4.
s +1 s-1
--------- + ------ = -6
3 7
s+1 s-1
------ + ------ = -6
3 7

7s + 3s+7-3
----- -------- ------ = -6
21

10s+4
--------- = -6
21

10s+4
---------- x 21 = -126
21

10s= -126-4

10s= -130
s= -13//

1.4m+1/3=5/3-m/3

4m=4/3-m/3

11m/3=4/3

11m=4

m=4/11

2.11-4n=22-n

11=22+3n

22+3n=11

11+3n=0

3n=-11

n=-(11/3)

3.h-[2h-2+10]=5h-170

h-2h+2-10=5h-170

-h-8=5h+170

6h+178=0

6h=-178

h=-(89/3)

4.s/3+1+s/7-1=-6

7s/21+3s/21=-6

10s/21=-6

10s=-126

s=-12.6

1. 4m +1/3 = 1 2/3 - 1/3m
4m +1/3m = 1 2/3 -1/3
4 1/3 m = 1 1/3
13/3 m= 4/3
m= 4/13

2. 4n-11-8n=22-n
-11-22= 8n-n -4n
3n= -33
n= -11

3. h-[2(h-1)+10]=5(h-34)
h-(2h-2+10)=5h- 170
h-2h+2-10=5h-170
2-10+170= 5h +2h-h
6h= 162
h= 27

4. s/3 +1+s/7-1=-6
7s/21+3s/21= -6-1+1
10s/21= -6
s=-63/5

2006-11-04 19:49:07 補充：
上面同下邊ge 人兄第一題都計錯數...

2006-11-13 15:01:46 補充：
第一題錯你地都投!!!!!