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

  1. 2x+y =182) x-y =6(x-y=6) multiply by +22x-2y = 121) 2x+y = 182) 2x-2y=12 -subtract equation 2 from equation 10x-y=6 -Therefore -y=6 so y= -6Put value for y into either of the equation in order to find value for xSo: 2x + (-6) = 18 2x - 6 = 18 2x = 24 x = 24/2 x = 12Therefore x=12, y=-6
SW
Answered by Saskia W. Maths tutor

4938 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

White paint costs £2.80 per litre. Blue paint costs £3.50 per litre. White paint and blue paint are mixed in the ratio 3 : 2 Work out the cost of 18 litres of the mixture.


Algebraic fractions


Solve x^(2)-x-12


Multiply out: (x - 2)(x + 5)


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