唔識做功課
回答 (14)
2006-12-18 3:34 am
✔ 最佳答案
...........2x = 4x - 60 .......2x+60=4x-60+60
...... 2x+60=4x
..2x-2x+60=4x-2x
.............60=2x
......... 60/2=2x/2
.............30=x
..............x=30
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2006-12-18 2:17 am
4x-2x= 60
2x = 60
x= 60/2
x= 30
2x = 60
x= 60/2
x= 30
2006-12-18 12:54 am
2x = 4x - 60
2x-4x=-60
-2x=-60
-2x/2=-60/2(記住負負得正呀!）
x=+30
2006-12-17 16:58:04 補充：
為咗增強說服力,話埋我家姐係中學生,都在所不惜。
2x-4x=-60
-2x=-60
-2x/2=-60/2(記住負負得正呀!）
x=+30
2006-12-17 16:58:04 補充：
為咗增強說服力,話埋我家姐係中學生,都在所不惜。
參考: 我家姐!
2006-12-18 12:34 am
2x = 4x -60
60 = 4x -2x
60 = 2x
x = 30
60 = 4x -2x
60 = 2x
x = 30
2006-12-18 12:25 am
X是=30.
2006-12-18 12:23 am
2x = 4x - 60
60=4x-2x
60=2x
2x=60
x=30
60=4x-2x
60=2x
2x=60
x=30
2006-12-18 12:22 am
2x = 4x - 60
60 = 4x - 2x
60 = 2x
x = 60 除 2
x = 30
60 = 4x - 2x
60 = 2x
x = 60 除 2
x = 30
參考: myself
2006-12-18 12:22 am
4x -2x = 60
2x = 60
x = 30
2x = 60
x = 30
收錄日期: 2021-04-12 18:21:07
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