Solve the simultaneous equation: 3x+y=-2, -7x+5y=34.

3x+y=-2        ...1)

-7x+5y=34     ...2)

Using the substitution method:

Rearrange equation 1):

y=-3x-2       ...1))

substitute equation 1)) into eqaution 2)

-7x +5(-3x-2)=34

-7x-15x-10=34

-22x=44

x=-2

subsitute x into 1))

y=-3(-2) -2

y=4

Therefore, x=-2, y=4

Answered by Shaan J. Maths tutor

6105 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Find the values of x: x^2 + 14x + 22 = 4x -2


Functions question: f(x) = 3x + 2a; g(x) = ax + 6; fg(x) = 12x + b. a and b are constants; Work out the value of b


Factorise 12x^2 - 20x + 3


Solve t^2-t=3(7+t)


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