Make x the subject of the formula when: y = 6-2x / 8

The first step is to multiply both side by 8, as this will cancel out the 8 that is beneath the 6-2x. This will then make the equation look like this: 8y = 6-2x. As we are making X the subject of the formula, we should ADD 2x to both sides of the equation, making it look like this: 8y + 2x = 6. To make X the subject of the formula further, we should SUBTRACT 8y from both sides so that 2x is isolated. This will make the equation look like this: 2x = 6 - 8y. The final step, as we want to have X as the subject of the formula, NOT 2x, is divide both of the sides by 2. This means the final equation we are left with, which has x as its subject is x = 3 - 4y.

Answered by Elia W. Maths tutor

4043 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Solve the following pair of simultaneous equations: 2y - x = 3, y + 4x = 4


Solve algebraically the simultaneous equations x^2 + y^2 = 25 and y - 3x = 13


Solve the simultaneous equations: x^2+y^2=36 ; x=2y+6


Amy earns £6 for every hour she works Monday to Friday. She earns £8 for every hour she works on Saturday. One week Amy worked for 5 hours on Saturday - she earned £130 that week. How many hours did she work from Monday to Friday?


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