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回答 (4)
2006-10-27 6:08 am
✔ 最佳答案
a = 4ba+b = 45
a+b = 45
4b+b = 45
5b = 45
b = 9
a = 4b
a = 4x9
a = 36
2006-10-27 6:11 am
1. a = 4b
2. a + b = 45
4b + b = 45
5b = 45
b = 9
3. a = 4x9
a = 36
2. a + b = 45
4b + b = 45
5b = 45
b = 9
3. a = 4x9
a = 36
2006-10-27 6:10 am
a=4b------1
a+b=45--------2
From 2,sub 1 into 2
4b+b=45
5b=45
b=9
Sub b =9 into 2
a+9=45
a=36
2006-10-26 22:11:49 補充：
如果係教緊solve 2 equations in two unknow最好用呢個格式...因為我之前都係教緊呢課...
a+b=45--------2
From 2,sub 1 into 2
4b+b=45
5b=45
b=9
Sub b =9 into 2
a+9=45
a=36
2006-10-26 22:11:49 補充：
如果係教緊solve 2 equations in two unknow最好用呢個格式...因為我之前都係教緊呢課...
2006-10-27 6:07 am
a=4b , a+b=45
so
4b+b=45
b=9
a=4 x 9 = 36
so
4b+b=45
b=9
a=4 x 9 = 36
收錄日期: 2021-04-23 14:30:44
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