Solve the simultaneous equations: 2x + y = 18, x - y = 6

Label each equation:2x + y = 18 (1)x - y = 6 (2)Since the y's have the same coefficient (ignoring the signs) you want to cancel the y's to leave just an equation with x.add (1) to (2):3x = 24Then rearrange for x as normal:x = 8 (3)Sub (3) into either (1) or (2):8 - y = 6Rearrange for y as normal:y = 2

MH
Answered by Megan H. Maths tutor

3646 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

How do I find the minimum turning point of a parabola?


Factorise x^2 + 4x +3


Solve the quadratic equation X^2+3X+2=0 by factorisation.


How do I solve a quadratic equation?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences