Solve the simultaneous equations 3x +y =11 and 2x+y=8

Equation 1: 3x+y= 11, Equation 2: 2x+y=8. You want to find out what x is and what y is.In both equations there is only 1 unit of y therefore it is easiest to rearrange the first equation so that it equals y this will become your equation 3. Equation 3: y=11-3x, Equation 2: 2x+y=8. Substitute equation 3 into equation 2. 2x+ 11-3x= 8 , 11-x=8, x= 11-8, x=3 Substitute x back into equation 3y=11-3x, y= 11-3(3), y=11-9, y=2. Therefore x= 3 and y= 2

KM
Answered by Kathryn M. Maths tutor

4071 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

For all values of x, f(x) = (x + 1)^2 and g(x) = 2(x-1). Show that gf(x) = 2x(x + 2).


Solve 3x^2 - 5 = 43


Factorise f(x) = x^2+4x+4 and sketch the curve, identifying the roots and minimum point of f(x).


Draw the graph for y = x^2 + 4x +2


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