在「2x + 3 = 7」中，x是什麼？
回答 (33)
2007-01-13 7:05 am
✔ 最佳答案
x是一個未知數題目的目的是找出一個數
令到這個算式中的左方等於右方
這條算式中
2x + 3 - 3 = 7 - 3
2x = 4
2x/ 2 = 4 / 2
x = 2
2007-01-14 6:53 am
2x + 3 = 7
2x=7-3
2x=4
x=4/2
x=2
2x=7-3
2x=4
x=4/2
x=2
2007-01-13 4:58 pm
我有個串d o既方法~~但係都係大同小異...
2x+3=7
2x/2+3/2=7/2 <-------全式除二
x+1.5=3.5
x=2
2x+3=7
2x/2+3/2=7/2 <-------全式除二
x+1.5=3.5
x=2
參考: 補習學返黎
2007-01-13 9:00 am
2x+3=7
x=2
x=2
2007-01-13 8:19 am
X=2
2x2+3=7
2x2+3=7
2007-01-13 7:19 am
2x=7-3
2x=4
x=4/2
x=2
2x=4
x=4/2
x=2
2007-01-13 7:06 am
x係代數
2x + 3 = 7
2x = 7 + 3
2x = 10
x = 10/2
x = 5
2x + 3 = 7
2x = 7 + 3
2x = 10
x = 10/2
x = 5
2007-01-13 7:05 am
x=2
2x+3=7
2x=7-3
2x=4
x=2
2x+3=7
2x=7-3
2x=4
x=2
2007-01-13 7:04 am
X=2
2x2+3=7
2x2+3=7
收錄日期: 2021-04-12 21:22:32
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https://hk.answers.yahoo.com/question/index?qid=20070112000051KK04854