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

Answered by Megan H. Maths tutor

3320 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

A truck travels 110 miles in 2 hours. What is the average speed of the truck?


Change the subject of the formula F=(t^2+4b)/c to b.


Expand the brackets (3x^2 + 6x + 7)(x - 3)


The hypotenuse of a triangle is 10m and another side is 8m. What is the length of side x?


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