Solve simultaneously: 2x + y = 18 and x - y = 6

Make both equal to y:y = 18 - 2xy = x - 6Make both equal to each other:18 - 2x = x - 63x = 24x = 8Substitute x into one of the original equations:x - y = 68 - y = 6y = 2So x = 8 and y = 2

TD
Answered by Tutor406540 D. Maths tutor

2687 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

With a bag of 5 blue marbles, 7 green marbles, and 3 red marbles. What is the probability of picking out two blue marbles? Pick them one at a time and do not replace them.


a). Solve x-4=13, b). solve 7y=35 c). solve 3w-9=27


Expanding a quadratic equation (x-3)(x-2)=0


Rationalise the denominator of (6 + 5√3 )/√3 Give your answer in its simplest form.


We're here to help

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

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning