請問如何做,我不會做
1. 7A= - 56
2. 5b+3=-12
3.16=8+0.4t
求解答過程，謝謝
請今天解答我
一元一次方程
2007-02-27 2:36 am
回答 (5)
2007-02-27 2:42 am
✔ 最佳答案
1, 7a = -56a = -56 / 7 = -8
2, 5b +3 = -12
5b = -12 - 3 = -15
b = -15 / 5 = -3
3, 16 = 8 +0.4t
0.4t = 16 - 8 = 8
t = 8 / 0.4 = 20
2007-02-27 10:03 pm
1. 7A= - 56
A=-56/7
A=-8
2. 5b+3=-12
5b+3-3=-12-3
5b=-15
b=-15/5=-3
3.16=8+0.4t
0.4t = 16 - 8 = 8
t = 8 / 0.4 = 20
A=-56/7
A=-8
2. 5b+3=-12
5b+3-3=-12-3
5b=-15
b=-15/5=-3
3.16=8+0.4t
0.4t = 16 - 8 = 8
t = 8 / 0.4 = 20
參考: 自己
2007-02-27 2:58 am
1.7a=-56
7a/-1 =-56/-1
-7a=56
-7a/7=56/7
-a=8
-a/-1=8/-1
a=-8
2.5b+3=12
5b+3-3=12-3
5b/5=9/5
b=1.8
3.16=8+0.4t
16-8=8+0.4t-8
8/0.4=0.4t/0.4
20=t
t=20
7a/-1 =-56/-1
-7a=56
-7a/7=56/7
-a=8
-a/-1=8/-1
a=-8
2.5b+3=12
5b+3-3=12-3
5b/5=9/5
b=1.8
3.16=8+0.4t
16-8=8+0.4t-8
8/0.4=0.4t/0.4
20=t
t=20
參考: 數學新里程(1上)
2007-02-27 2:46 am
1. 7A=56
7A /7 =56/7
A=8
2. 5b+3=12
5b+3-3=12-3
5b/5=9/5
b=1.8
3.
16=8+0.4t
16-8=8+0.4t-8
8=0.4t
8/0.4=0.4t/0.4
0.05=t
t=0.05
2007-02-26 18:48:02 補充：
1. 7A=567A /7 =56/7A=82. 5b 3=125b 3-3=12-35b/5=9/5b=1.83.16=8 0.4t16-8=8 0.4t-88=0.4t8/0.4=0.4t/0.40.05=tt=0.05
2007-02-26 18:48:04 補充：
1. 7A=567A /7 =56/7A=82. 5b 3=125b 3-3=12-35b/5=9/5b=1.83.16=8 0.4t16-8=8 0.4t-88=0.4t8/0.4=0.4t/0.40.05=tt=0.05
7A /7 =56/7
A=8
2. 5b+3=12
5b+3-3=12-3
5b/5=9/5
b=1.8
3.
16=8+0.4t
16-8=8+0.4t-8
8=0.4t
8/0.4=0.4t/0.4
0.05=t
t=0.05
2007-02-26 18:48:02 補充：
1. 7A=567A /7 =56/7A=82. 5b 3=125b 3-3=12-35b/5=9/5b=1.83.16=8 0.4t16-8=8 0.4t-88=0.4t8/0.4=0.4t/0.40.05=tt=0.05
2007-02-26 18:48:04 補充：
1. 7A=567A /7 =56/7A=82. 5b 3=125b 3-3=12-35b/5=9/5b=1.83.16=8 0.4t16-8=8 0.4t-88=0.4t8/0.4=0.4t/0.40.05=tt=0.05
參考: me
2007-02-27 2:44 am
1.7A= -56
A= -56/7
A= -8
2.5b+3= -12
5b= -12-3
b= -15/5
b= -5
3.16=8+0.4t
16-8=0.4t
8/0.4=t
3.2=t
t=3.2
A= -56/7
A= -8
2.5b+3= -12
5b= -12-3
b= -15/5
b= -5
3.16=8+0.4t
16-8=0.4t
8/0.4=t
3.2=t
t=3.2
參考: 自己
收錄日期: 2021-04-13 14:40:39
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070226000051KK03423