How do I solve fractions with unknowns in the denominators?

To solve the equation: (5x+3)/(x) + x = 1, where (x) is the denominator, we have to convert the equation into an equation without any denominators.

To do this, we multiply each variable by (x), so the equation becomes: (5x+3) + (x)(x) = (1)(x).

The next step is to expand the brackets: 5x + 3 + x^2  = x

After this, we move all variables onto one side of the equation (by subtracting x from both sides) so that it equals 0: x^2 + 4x + 3 = 0 

Factorsing this equation we get: (x + 3)(x + 1) = 0

Therefore, we can equate each bracket to 0, giving the solutions for x:

x + 3 = 0, x = -3

x + 1 = 0, x = -1

 
 

Answered by Sophie A. Maths tutor

4781 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

The circle c has equation x^2 + y^2 = 1. The line l has gradient 3 and intercepts the y axis at the point (0, 1). c and l intersect at two points. Find the co-ordinates of these points.


How do I simplify a surd?


Solve for x and y: x ^2 +2y = 9,y = x + 3


Solve the following simultaneous equations: A. 2x-2y=18 and B. 3x+y=23


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences