小學數學(方程)

2007-02-05 8:09 pm
1. 2.3s -8=38 2. 28.9+0.6a=30.7 3. 12(f-10)=144


4. p(1+19%)=2.38 5. 11(13+y)=143


6. x(1-27%) =3.65

回答 (3)

2007-02-05 8:44 pm
✔ 最佳答案
1. 2.3s -8=38
2.3s=38+8
2.3s=46
s=46/2.3
s=20

2. 28.9+0.6a=30.7
0.6a=30.7-28.9
0.6a=1.8
a=1.8/0.6
a=3

3. 12(f-10)=144
f-10=144/12
f-10=12
f=12+10
f=22

4. p(1+19%)=2.38
p(1+0.19)=2.38
1.19p=2.38
p=2.38/1.19
p=2

5. 11(13+y)=143
13+y=143/11
13+y=13
y=13-13
y=0

6. x(1-27%) =3.65
x(1-0.27)=3.65
0.73x=3.65
x=3.65/0.73
x=5
2007-02-05 8:14 pm
1. 20
2. 3
3. 22
4. 2
5. 0
6. 5
2007-02-05 8:13 pm
1. 2.3S=46
S=46/2.3
S=20


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