Solve the simultaneous equations: 3x + y = -4 and 3x - 4y = 6

First subtract the first equation from the second getting:0 - 5y = 10-5y = 10Then divide both sides by (-5)y = -2Then substitute the y value of (-2) back into the first equation giving:3x + (-2) = -43x = -2x = -2/3And then check by substituting both values into the other equation that you were given.3(-2/3) -4(-2) = -2 +8=6There for the answer is, x=-2/3 and y=-2

Answered by Luke C. Maths tutor

4871 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Solve the inequality 7x+3y-4 > 5y-19x for y in terms of x.


Factorise 15a^2 + ab - 6b^2


Factorise the Quadratic: 3x^2 + 2x - 1.


2x^2 - 16x + 32


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences