Solve these 2 equations simultaneously: 7x+y=1 and 2x squared - y=3

7x+y=1 (1)  ->   y= 2x- 3 (3)

7x + 2x-3-1=0 -> (2x-1)(x+4)=0 so 2x-1=0 so 2x=1 so x=0.5 and x+4=0 so x=-4

7(0.5)+y=1 so y=1-3.5 so y=-2.5 and 7(-4) +y=1 so -28+y=1 so y= 29

Full answer:

x=0.5 y=-2.5 and x=-4 y=29

HV
Answered by Hannah V. Maths tutor

3410 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

If x^2 + y^2 = 20 and y=10 - 2x, find x and y.


how do you know if two straight lines on a graph are parallel or perpendicular?


How do you expand brackets?


State the nth term of the following sequence: 3, 7, 11, 15, 19


We're here to help

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

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences