How do you solve for x in a fraction?

Question

I need to solve 15+x / x = 12 / 4
(15+x over x equals 12 over 4)
How do you do that?

Answer 1

60+4x = 12x ==> x = 60/8 = 7.5

Answer 2

well, x over x should jus equal x? for example, if x=3? 15 plus 3 over 3 is 1? so it would b 15 over x equals 12 over 4. 12x over 60 which means x=5?

Answer 3

Get rid of the denominators by multiplying through by them.

(15 + x)/x = 12/4

Reduce first:

(15 + x)/x = 3

Now multiply both sides by x:

15 + x = 3x

and solve from there. Remember - the fact that you had x in the denominator to start means that x cannot be 0. It won't happen here, but if 0 had turned up as an answer, it would have to be rejected.

Answer 4

12/4=3 so, 15+x/x=3 multiply by x to move the x over to the right

15+x= 3x subtract x from both sides

15=2x divide by 2

x= 15/2

Answer 5

i think 12/4 equals 3. 15 +3 equals 18? i dont know if this is correct

Answer 6

15+x/x = 12/4

~ 12 divided by 4 equals 3.
15+x/x = 3
~ You multiply "x" on both sides.
15+x = 3x
~ You subtract 1x on both sides.
15 = 2x

15/2 = x
7.5 = x

Answer 7

(15+x)/x = 12/4
(15+x)/x = 3
(15+x) = 3x
15 = 3x - x
15 = 2x
x = 15/2 = 7 1/2

Answer 8

(15+x)/x = 12/4
(15+x)/x = 3
15+x = 3x
15 = 2x
x = 15/2 = 7.5

Answer 9

(15+x)/x = (12/4)
12/4 = 3
15+x / x =3
15/x + 1 = 3
15/x = 2
15 = 2x
x = 7.5

I'm not sure if that's right but try it.

Answer 10

i got x=15/2
there are a lot of ways to do it. multiply both sides by x and you'll get 15+x=12x/4
then multiply by 4 and you'll get 60 +4x=12x
then subtract 4x from each side, and youll get 60=8x
divide both sides by 8 and you'll get 15/2 aka 7.5