SOLUTION: 2{{{1/2}}} OVER x = {{{10/3}}} 2{{{1/2}}} is the numerator and x is the denomanator, I need to figure out what x is. I dont know how to slove a problem with a fraction like this

Algebra ->  Expressions-with-variables -> SOLUTION: 2{{{1/2}}} OVER x = {{{10/3}}} 2{{{1/2}}} is the numerator and x is the denomanator, I need to figure out what x is. I dont know how to slove a problem with a fraction like this      Log On


   



Question 181833: 21%2F2 OVER x = 10%2F3
21%2F2 is the numerator and x is the denomanator, I need to figure out what x is. I dont know how to slove a problem with a fraction like this. I have submited this problem before but couldnt understand the answer. So please show your work and please explain how you got the answer. And if you can could you please explain to me why the fraction is like that and what they are used for so I can better understand it in the future?
Thank You

Found 2 solutions by edjones, josmiceli:
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
2.5/x=10/3
7.5=10x multiply each side by 3x (LCM) to eliminate fractions.
x=.75
.
Another way:
2 1/2 = 5/2
5/2 / x = 5/2 * 1/x = 5/2x
5/2x = 10/3
15=20x multiply each side by 6x (LCM) to eliminate fractions.
x=.75
Ed

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
2 1/2 is a mixed number and has to be converted to a pure fraction
2 1/2 is actually 2+%2B+1%2F2, so what you have to answer is:
"How many 1/2's are in 2? There are 4 1/2's in 2 because
4%2A%281%2F2%29+=+2
Now you have 4%2A%281%2F2%29+%2B+%281%2F2%29+=+5%2A%281%2F2%29
and
5%2A%281%2F2%29+=+5%2F2
So, now you have
%285%2F2%29%2Fx+=+10%2F3
Remeber that 5%2F2 is just a number and it's OK for it to be
the numerator of a fraction. If you wanted to, you could
represent it as 2.5, but it's OK the way it is
Now multiply both sides of the equation by x
5%2F2+=+%2810%2F3%29%2Ax
Now multiply both sides by 6
3%2A5+=+2%2A10%2Ax
15+=+20x
Divide both sides by 20
x+=+15%2F20
x+=+3%2F4 answer
To prove the answer, just put this result back into the
original equation
%285%2F2%29%2Fx+=+10%2F3
%285%2F2%29%2F%283%2F4%29+=+10%2F3
Now you've got fractions in both numerator and denominator,
but it's still OK
MUltiply the left side only by %284%2F3%29%2F%284%2F3%29, which is
actully just 1
%28%284%2F3%29%2F%284%2F3%29%29%2A%28%285%2F2%29%2F%283%2F4%29%29+=+10%2F3
Notice that the denominator is %284%2F3%29%2A%283%2F4%29 which is 1
%284%2F3%29%2A%285%2F2%29+=+10%2F3
20%2F6+=+10%2F3
10%2F3+=+10%2F3
OK