how to solve 3x-1=5+2x?

2008-08-26 6:30 am

回答 (7)

2008-08-26 6:35 am
✔ 最佳答案
If 3x - 1 = 5 + 2x, we subtract 2x from both sides, giving us:

x - 1 = 5, and we add one to both sides, giving us:

x = 6.

Checking:

3 * 6 - 1 = 17. 5 + 2*6 = 17, so it checks out.
2008-08-26 4:28 pm
3x - 2x = 5 + 1
x = 6
2008-08-26 4:16 pm
3x - 1 = 5 + 2x
3x - 2x = 5 + 1
x = 6
2008-08-26 1:37 pm
3x-1=5+2x subtract by 2x
x-1=5 add by 1
x=6
2008-08-26 1:35 pm
3x -1 = 5 + 2x.
+1 = +1 + 2x
3x = 6 + 2x
-2x -2x
x = 6
參考: my brain, lol.
2008-08-26 1:35 pm
3x-1=5+2x

cobine similar terms

3x - 2x = 5 + 1
x = 6
2008-08-26 1:34 pm
What you do to one side you always do to the other. Start by trying to get all the X's to one side, then all the numbers to the other side:

3x-1 = 5+2x
-2x -2x

1x-1=5
+1 +1

1x=6
x=6


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