what is 8x-14=20x-15?

2009-08-22 6:54 am

回答 (9)

2009-08-22 7:09 am
✔ 最佳答案
8x-14=20x-15
12x=1
x=1/12 ===> the answer
2009-08-22 2:00 pm
8x-14=20x-15 subtract 8x
-14=12x-15 add 15 to both sides
1=12x divide by 12
x=1/12
2009-08-22 1:57 pm
1/12=x
2009-08-22 6:50 pm
An equation !

Solution is :-

1 = 12 x

x = 1 / 12
2009-08-22 4:35 pm
8x - 14 = 20x - 15
8x - 20x = 14 - 15
-12x = -1
x = -1/(-12)
x = 1/12
2009-08-22 2:14 pm
8x-14 = 20x-15
-14+15 = 20x-8x
1 = 12x
12x = 1
x = 1/12
2009-08-22 2:04 pm
well it seems to me that if you can't get the answer, then you don't understand how to figure it out. Let's talk about that before we get to the answer. The trick is to get all the variable terms on one side, and all the non-variable terms on the other side. Let's keep the variable on the right. It'll be simpler that way.

So move the (+ 8x) across the equal sing, making it a (- 8x). That leaves you with:

-14 = 12x - 15

Now move the (- 15) across, making it a (+ 15), and giving us:

1 = 12x

Now divide to get "x" all alone over there, and yes. We DO in fact have:
1/12
2009-08-22 2:02 pm
8x-14=20x-15
-8x - 8x
-14=12x-15
+15 +15
1=12x
-----------
12 12

Answer: 1/12=x
參考: Me
2009-08-22 1:57 pm
I think the answer is 1/12.


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