Solve for X and Y: 2y + x = 7; 3y - x = 8

x=1, y=3; Firstly, rearranging for x in the first equation: x = (7-2y); Substitute this into the second equation: 3y - (7 -2y) = 8; Expand: 3y -7 +2y = 8 (watch negative) 3y +2y = 15 Therefore, 5y = 15 and y=3. Now substitute Y into either of the equations to find x: 2(3) + x = 7 6 + x = 7 Therefore x = 1.

Answered by Ruth K. Maths tutor

4054 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

A right angled triangle has 2 known sides measuring 3 meters, 4 meters respectively. Find the hypotenuse and the smallest angle in the triangle.


A is directly proportional to B^2 . When B=6, A=54 . Write a formula relating A and B, and find A when B= 13.


Prove that the sum of four consecutive whole numbers will always be even.


Show that a parallelogram is composed of an isosceles trapezium and an isosceles triangle


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 2013–2024

Terms & Conditions|Privacy Policy