中一數學!!20點20點!!!最緊要快

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

2p+1=0.4p=9 ????

6m+4m-2=8+5m
15m=10
m=2/3

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

5(m-1)=3-7
5m-5=-4
5m=1
m=1/5

5-4(3-2)=-20???? no a,b,c......

5(+4)-6(8+3Y)=-2
20-48-18Y=-2
26=18Y
Y=26/18
Y=13/9

2008-10-15 17:49:02 補充：
leungkinkeung 第二條計到 5 ，咁係一定錯！

0.4 * 5 = 2

仲話自己all correct ！

1. 2b-6=b+7
2b-b-6=7
b=7+6
b=13

2. 2p+1=0.4=9
唔係一條數黎嫁..
你打咩呀?

3. 6m+4m-2=8+5m
10m-5m-2=8
5m=8+2
m=2

4. 7+2e=9e-14-6e
7+14=9e-6e-2e
e=21

5. 5(m-1)=3-7
5m-5=-4
5m=1
m=1/5
=0.2

6. 5-4(3-2)=-20
冇得計．．．

7. 5(+4)-6(8+3y=-2
20-48-18y=-2
-28-18y=-2
-18y=26
y=26/18
y=13/9

2B-6=B+7
2B-B=7+6
B=13

唔明第二題 可以再詳細D

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

7+2E=9E-14-6E
2E-9E+6E=-14+7
-E=-7
E=7

5(M-1)=3-7
5M-5=-4
5M=1
M=1/5

5-4(3-2)=-20-----無代數,計咩

5(4)-6(8+3Y)=-2
20-48-18Y=-2
-26=18Y
Y=18/26

2b-6=b+7
b=13

2p+1=0.4p=9
P=2

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

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

5(m-1)=3-7
5m-5=-4
m=1/5

5-4(3-2)=-20
???
5(+4)-6(8+3Y)=-2
20-48-18Y=-2

b=13

p=5

m=2

e=21

m=0.2

5-4(3-2)=-20( 可能條問題出錯,因為冇可能冇unknow)

Y=8 2/3

b=13

p=5

m=2

e=21

m=0.2

5-4(3-2)=-20

Y=8+2/3

b=13

p=5

m=2

e=21

m=0.2

5-4(3-2)=-20(no answer)

Y=8+2/3

2008-10-14 20:24:13 補充：
ansonlee's some answers are wrong. mine is correct for sure. Hope it can help u

2008-10-14 20:38:52 補充：
please don't copy, I calculate by myself