4m+5=7m-7
m=????
6年級數學(方程)
2007-06-14 2:52 am
回答 (8)
2007-06-14 2:56 am
✔ 最佳答案
4m+5=7m-7 5 + 7 = 7m – 4m
12 = 3m
m = 4
2007-06-15 10:01 pm
4m+5=7m-7
-3m=-12
m=4
-3m=-12
m=4
2007-06-15 3:55 am
3m4m+5=7m-7
4m+5+7=7m-7+7
12+4m-4m=7m-4m
3m=12
m=4 =
4m+5+7=7m-7+7
12+4m-4m=7m-4m
3m=12
m=4 =
2007-06-14 3:26 am
4m + 5=7m - 7
5+7=7m-4m
12=3m
3m=12
m=12/3
m=4
5+7=7m-4m
12=3m
3m=12
m=12/3
m=4
2007-06-14 3:16 am
4m+5=7m-7
4m+5+7=7m
4m+12=7m
大家都知道，4m+3m=7m
宜加就係: 4m+12=7m
即係3m=12
m=12/3
m=4
所以m=4
4m+5+7=7m
4m+12=7m
大家都知道，4m+3m=7m
宜加就係: 4m+12=7m
即係3m=12
m=12/3
m=4
所以m=4
參考: me
2007-06-14 3:00 am
7m-7+7=4m+5+7
7m=4m+12
4m+12-4m=7m-4m
3m=12
m=4
7m=4m+12
4m+12-4m=7m-4m
3m=12
m=4
2007-06-14 2:59 am
我諗係咁:
4m+5=7m-7
7m – 4m = 5 + 7
3m = 12
m = 4
4m+5=7m-7
7m – 4m = 5 + 7
3m = 12
m = 4
2007-06-14 2:58 am
4m+5=7m-7
4m+5+7=7m-7+7 (兩邊同時加7)
12+4m-4m=7m-4m (兩邊同時減4m)
3m=12
m=4
4m+5+7=7m-7+7 (兩邊同時加7)
12+4m-4m=7m-4m (兩邊同時減4m)
3m=12
m=4
收錄日期: 2021-04-13 00:37:37
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