以下的數學題應該怎樣計算?(連步驟)!please help me!

1
8A+2A=60
A=60/10
A=6

2007-03-07 16:57:15 補充：
2. 60% x 7P = 9.87P=9.8/0.6P=16.3/7=2.333. ( 1 25% )B =321.25B=32B=32/1.25B=25.64. 7( B 加 30 % )=16.38B加0.3=2.34B=2.045. 3 ( P - 4.5 ) = 8.1P-4.5=8.1/3P=2.7加4.5p=7.2

1 . 8A=60-2A
8A+2A=60
10A=60
A=60/10
A=6

2. 60% x 7P=9.8
0.6x7P=9.8
7P=9.8/0.6
7P=16
P=2.28

3. (1+25%)B=32
(1+0.25)B=32
1.25B=32
B=32/1.25
B=25.6

4. 7(B+30%)=16.38
B+30%=16.38/7
B+0.3=2.34
B=2.34-0.3
B=2.04

5. 3(P-4.5)=8.1
P-4.5=8.1/3
P-4.5=2.7
P=2.7+4.5
P=7.2

1.)8A = 60 - 2A
10A=60
A=6

2.)60% x 7P = 9.8
60%= 9.8 / 7P
60%= 1.4/P
0.6=1.4/P
3/5=14/10P
3X10P=14X5
30P=70
P=7/3 - - - - - - - - - - - - [sor .....so long ........]

3.) ( 1+ 25% )B =32
1.25B=32
B=32/1.25
B=3200/125
B=25.6

4.) 7( B + 30 % )=16.38
7B+210%=16.38
7B=16.38-2.1
7B=14.28
B=2.04

5.) 3 ( P - 4.5 ) = 8.1
3P-13.5=8.1
3P=21.6
P=7.2

[HoPe I CaN HeLp U *~~ ]