Where do the lines 2y = 4x + 2 and - 3x + y = 4 intersect?

Rearrange the second equation in the form y = mx + c to get y = 3x + 4. Divide the first equation by 2 to get y = 2x + 1. When the lines intersect, they'll have the same x and y values, hence, set the equations equal to each other to find the x co-ordinate: 2x + 1 = 3x + 4. Collecting like terms gives 1 = x + 4, and then taking the 4 to the other side of the equation gives x = -3. This value is substituted into either equation, allowing you to find the y co-ordinate: (using equation 1) y = 2(-3) + 1, which gives y = -5. Therefore, the two lines intersect at the point (-3,-5).

EJ
Answered by Emma J. Maths tutor

2546 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Define x and y if 3x+y=11 and 5x-2y=11


A scalene triangle has 3 angles ABC in degrees, where A = (3x + 7), B = (4x + 5), C = (x + 8). Find the value of largest angle.


When do we add and when do we multiply probabilities?


Find the value (8/125)^-2/3


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