數學功課 !!!!!!! 幫幫忙!!!!!!!!!

7q=15+11q-3
-4q=12
q=-3

2b-6=b+7
b=13

2p+1=0.4p+9
1.6p=8
p=5

6m+4m-2=8+5m
10m-2=8+5m
5m=10
m=2

7+2e=9e-14-6e
7+2e=3e-14
21=e

5(m-1)=3m-7
5m-5=3m-7
2m=-2
m=-1

5y-4(3y-2)=-20
5y-12y+8=-20
-7y+8=-20
-7y=-28
y=4

5(y+4)-6(8+3y)=-2
5y+20-48-18y=-2
-13y-28=-2
-13y=-26
y=2

2007-09-29 12:08:10 補充：
錯左少少...應該係...5(y 4)-6(8 3y)=-2 5y 20-48-18y=-2-13y-28=-2-13y= 26 y=-2

1. 7q=15+11q-3
7q=12+11q
7q-11q=12+11q-11q
-4q=12
q=-3
2. 2b-6=b+7
2b-b-6=b+7-b
b-6=7
b-6+6=7+6
b=13
3. 2p+1=0.4p+9
2p+1-1=0.4p+9-1
2p=0.4p+8
2p-0.4p=0.4p+8-0.4p
1.6p=8
p=5
4. 6m+4m-2=8+5m
10m-2=8+5m
10m-2+2=8+5m+2
10m=10+5m
10m-5m=10+5m-5m
5m=10
m=2
5. 7+2e=9e-14-6e
7+2e=3e-14
7+2e-2e=3e-14-2e
7=e-14
7+14=e
e=21
6. 5(m-1)=3m-7
5m-5=3m-7
5m-5+5=3m-7+5
5m=3m-2
5m-3m=3m-2-3m
2m=-2
m=-1
7. 5y-4(3y-2)=-20
5y-12y+8=-20
-7y+8=-20
-7y+8-8=-20-8
-7y=-28
y=4
8. 5(y+4)-6(8+3y)=-2
5y+20-48-18y=-2
-13y-28=-2
-13y-28+28=-2+28
-13y=26
y=-2


i hope i can help you

7q=15+11q-3
7q-11q=12
-4q=12
q=-4
---------------------
2b-6=b+7
-7-6=-b
-13=-b
b=13
------------------
2p+1=0.4p+9
2.4p=9-1
p=10/3
----------------
6m+4m-2=8+5m
10m-5m=8+2
5m=10
m=2
--------------------
7+2e=9e-14-6e
21=9e-6e-2e
21=e
e=21
--------------------
5(m-1)=3m-7
5m-5=3m-7
2m=-2
m=-1
----------------
5y-4(3y-2)=20
5y-12y-8=20
-7y=28
-y=4
y=-4
--------------------
5(y+4)-6(8+3y)=-2
5y+20-48-18y=-2
-13y-28=-2
-13y=26
y=-2
應該無錯嫁喇

2007-09-29 12:17:49 補充：
2p 1=0.4p 92.4p=9-1p=10/3錯左= =應該係2p 1=0.4p 92p-0.4p=9-11.6p=8p=5

1) 7q-11q=12
-4q=12
q=-3

2) 2b-b=7+6
b=13

3) 2p-0.4p=9-1
1.6p=8
p=5

4) 10m-5m=8+2
5m=10
m=2

5) 2e-9e+6e= -14-7
e= - 21

6) 5m-5=3m-7
5m-3m=-7+5
2m=-2
m=-1

7) 5y-12y+8=-20
-7y=-28
y=4

8) 5y+20-48-18y=-2
5y-18y=-2+28
-13y=26
y=-2

2007-09-29 12:17:44 補充：
5) -e=-21 e=21

7q=15+11q-3
-12=4q
q=-3

2b-6=b+7
b=7-6
b=1

2p+1=0.4p+9
1.6p=9-1
1.6p=8
p=5

6m+4m-2=8+5m
(6+4-5)m=8
5m=8
m=1.6

7+2e=9e-14-6e
7+14=(9-6-2)e
21=e
e=21

5(m-1)=3m-7
5m-5=3m-7
5m-3m=-7-5
2m=-12
m=-6

5y-4(3y-2)=-20
5y-12y-12=-20
20-12=7y
8=7y
y=8/7

5(y+4)-6(8+3y)=-2
5y+12-48+18y=-2
23y=34
y=34/23