Please help me solve this problem 2/12x-3/12=8/12.?

2009-08-28 11:57 am
Please walk me through the steps on how to solve this problem.

回答 (13)

2009-08-30 5:33 pm
✔ 最佳答案
1st interpretation:
2/12x - 3/12 = 8/12 multiply all items by 12
2x - 3 = 8
2x = 11
x = 11/2 or 5 1/2

Answer: x = 5 1/2 or 5.5

Proof:
2/12(5.5) - 3/12 = 8/12
1/6(5.5) - 3/12 = 2/3
5.5/6 - 3/12 = 2/3
11/12 - 3/12 = 2/3

2nd interpretation:
(2/[12x - 3])/12 = 8/12
2/(12x - 3) = 8
1/(12x - 3) = 4
48x - 12 = 1
48x = 13
x = 13/48

Answer: x = 13/48

Proof:
(2/[12[13/48] - 3])/12 = 8/12
(2/[13/4 - 12/4])/12 = 2/3
(2/[1/4])/12 = 2/3
(2[4])/12 = 2/3
8/12 = 2/3
2/3 = 2/3
2009-08-31 4:31 pm
2 /12x-3/12=8/12

using 12x as the lcd

2-3x=8x
2=11x
11/2=x
2009-08-30 9:13 pm
2/12x - 3/12 = 8/12
2/12x = 11/12
(12/2)2/12x = (12/2)11/12
x = 11/2 or 5 1/2 or 5.5.
2009-08-29 10:13 am
2/12(x) - 3/12 = 8/12
1/6(x) - 1/4 = 2/3
12(x/6 - 1/4) = 12(2/3)
12x/6 - 12/4 = 24/3
2x - 3 = 8
2x = 8 + 3
x = 11/2 (5.5)
2009-08-29 2:10 am
✰Answer✰

x = 2/11

✐Derivation✐

[2/12x - 3/12 = 8/12]12

Get rid of the denominator.

2/x - 3 = 8

Add both sides by 3.

2/x = 11

Now, interchange the numerator and denominator.

x/2 = 1/11

Multiply both sides by 2.

x = 2/11
2009-08-28 1:36 pm
Question , as given , is open to doubt.

I suspect that you may mean :-

2 / (12 x - 3 ) / 12 = 8 / 12

24 / ( 12 x - 3 ) = 8 / 12

288 = 96 x - 24

96 x = 312

x = 312 / 96 = 26 / 8 = 13 / 4

PS
Questions must be expressed in a manner such that there is no doubt as to how question is meant to read.
In order to do so brackets must be used.
2009-08-28 12:20 pm
As the whole equation is divided by 12, multiply by 12.
Therefore 2/x - 3 = 8
Add both sides by 3, to get 2/x by itself.
Therefore 2/x = 8 + 3 = 11
Then multiply by x.
2 = 11x
Therefore x = 2/11 !!
2009-08-28 12:12 pm
Divide the equation by 12 since denominators are the same!!
===========>>>
Hence 2/x - 3 = 8

Now take like terms on the same side
===========>>>
So, 2/x = 11

Now solve x
===========>>>
x= 2/11
參考: Maths
2009-08-28 12:09 pm
2/12x - 3/12 = 8/12; so...

2/12x = 11/12; so...

121x = 24; so...

x = 24/121, so...

x = 2/11
2009-08-28 12:05 pm
2/12x-3/12=8/12
2/12x= 8/12+3/12= 11/12
1/6x=11/12
11* 6x= 1*12
66x= 12
x= 12/66= 2/11


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