2x + 5 = 10 : value of x?
回答 (14)
✔ 最佳答案
2x = 5
x = 5 / 2
x = 2½
2x+5=10
Take 5 away from both sides
2x+5-5=10-5
Simplify
2x=5
Divide both sides by 2
x=5/2
10x=5+10 10x=15 x=1 1/2 2x=? 2x=3
2x + 5 = 10
2x = 10 - 5
2x = 5
x = 5/2
x = 2 1/2 (2.5)
2x+5=10
-5 -5
2x=5
2/x=5/2
2x+5=10
Subtract five from both sides. Numbers and variables don't like to be on the same side.
2x=5
Divide each side by two. x Likes to be alone.
x=5/2, or x=2.5
2x+5=10
We subtract 5 from both sides of the equation, now we have
2x=5
We divide both sides of the equation by 2, giving us
2.5
參考: I am math enthusiast!
2x+5=10
2x=10-5
2x=5
x=5/2
x=2.5
2x+5=10
2x=10-5
2x=5
x = 5/2
hope that helps...
2*(2.5) + 5 = 10
so x=2.5
收錄日期: 2021-05-01 10:18:33
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080322213122AAagfQa
檢視 Wayback Machine 備份