Solve simultaneously: 2x + y = 18 and x - y = 6

Make both equal to y:y = 18 - 2xy = x - 6Make both equal to each other:18 - 2x = x - 63x = 24x = 8Substitute x into one of the original equations:x - y = 68 - y = 6y = 2So x = 8 and y = 2

Answered by Tutor406540 D. Maths tutor

2190 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Prove n^3-n is multiple of 6 for all n


x^2 +y^2 =25, y – 3x = 13 - Simultaneous Equations (June 2017)


When rolling two dice, what is the probability of rolling 7?


(given a graph with a straight line and 2 labelled points) Find the equation of the line.


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 2013–2024

Terms & Conditions|Privacy Policy
Cookie Preferences