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

x = 6 + y
2(6+y) + y = 18
12+2y+y = 18
3y = 18-12
3y=6
y = 6/3 = 2. So y = 2 if y = 2 then x is = ?
x - y = 6 so, x-2 = 6
so x is 6+ 2 = 8
x = 8 and y = 2

OO
Answered by Olufunke O. Maths tutor

2616 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

What is the difference between a parametric equation and a general equation?


Here are some fractions: 3/10, 2/8, 4/12, 12/40, 5/20. Which of these fractions are equivalent to 1/4?


Expand and Simplify: (x+2)(x+3)(x−3)


£3000 is invested for 2 years at 3.8% per annum compound interest. What is the total interest earned over the 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