Solve the following inequality: 5x - 7 > 18 ?
回答 (5)
2008-12-05 4:48 pm
✔ 最佳答案
5X-7>185X>25
X>5
2008-12-05 5:24 pm
x > 5.
2008-12-05 4:45 pm
Add 7 to both sides
5x - 7 + 7 > 18 + 7
5x > 25
Divide both sides by 5
5x/5 = x > 25/5 = 5
Since 5 is positive, the direction of the inequality stays the same
5x - 7 + 7 > 18 + 7
5x > 25
Divide both sides by 5
5x/5 = x > 25/5 = 5
Since 5 is positive, the direction of the inequality stays the same
參考: Longtime college math teacher
http://www.CharlesAshbacher.net
2008-12-05 4:42 pm
5x > 25
x > 5
x > 5
2008-12-05 4:41 pm
5x - 7 > 18
5x > 18 + 7
5x > 25
x > 25/5
x > 5
5x > 18 + 7
5x > 25
x > 25/5
x > 5
收錄日期: 2021-05-01 11:39:23
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https://hk.answers.yahoo.com/question/index?qid=20081205083909AAbqIxd