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

Step 1) 2x + y = 18 (a) Step 2) x - y = 6 (b) Step 3) using (a): y = 18 - 2x (c) Step 4) using (b): y = x - 6 (d) Step 5) Combine (c) and (d): 18 - 2x = x - 6 (e) Step 6) Rearange (e) to find x: 3x = 24 --> x = (24/3) --> x = 8 Step 7) Incert x into (b): 8 - y = 6 (f) Step 8) Rearange (f) to find y: y = 2

Answered by Gabriel E. Maths tutor

2083 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Find the coordinates of the mid-point AB where A (-3,-3) and B (1,3)


A voucher takes 12% off a bill at a restaurant. After using the voucher, the bill for a meal is £31.68. How much was the bill before using the voucher?


Solve the simultaneous equations: 4X+6Y=4 and 7X+5Y=12.5


y = x^2 + 4x + 7 Find the turning point of the equation by completing the square.


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