# Math Help - Making x the subject of this

1. ## Making x the subject of this

Hey,

I haven't done maths for many years, and i'm just wondering how x could be made the subject of this equation:

x = 8 - 15/x

Thanks

EDIT

lmao sorry not x the subject
how could you solve this to get a value of x?

2. Originally Posted by mark17188
Hey,

I haven't done maths for many years, and i'm just wondering how x could be made the subject of this equation:

x = 8 - 15/x

Thanks

EDIT

lmao sorry not x the subject
how could you solve this to get a value of x?
multiply every term in the equation by x and solve the resulting quadratic equation ...

$x^2 = 8x - 15$

$x^2 - 8x + 15 = 0$

$(x - 3)(x - 5) = 0$

$x = 3$ , $x = 5$