Solve the simultaneous equations;5x +y = 21 and x-3y=9

Two ways of doing this, substitution and elimination. Could teach both so students choose which they prefer
Substitution;change the second equation into x=3y+9 then substitute it into the first equation where there's an 'x'. Expand and simplify and substitute your x value to work out the y value

Answered by Kameel O. Maths tutor

4511 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

What is the length of a if a triangle has lengths of b=6.4cm and c=5.6cm with an angle A=107.9 degrees?


1/4+0.5


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


Factorise the expression given


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