Make x the subject of the equation y=(3x+5)/(4-x)

(1) Get rid of the fraction by multiply both sides by (4-x), we now have y(4-x)=3x+5. (2) Expand any brackets, so 4y-py=3x+5. (3) Rearrange to get all the x to one side: 4y-5=3x+px. (4) Factorise x because we want x by it self in the end: leaving us 4y-5=x(3+y). (5) Divide both side by 3+y, hence x=(4y-5)/(3+y).

GF
Answered by Gwen F. Maths tutor

11716 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

How do you rearrange formula?


Write the equation x^2 + 6x - 40 = 0 in the form (x + a)^2 - b = 0 and then solve for x


Solve 4 + 3(2x - 5) = x + 9.


If I put £500 in the bank with an annual interest rate of 3% how much money will I have earned in 2 years?


We're here to help

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

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences