solve the simultaneous equation: 5x+y =21 and x-3y=9

5x+y=215x-15y=45
16y = -24 y = -1.5
5x -1.5 =215x=22.5x=4.5

Answered by Caitlin M. Maths tutor

2311 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Bob and Bill have 50 sweets to share in the ratio 4:6 respectively. how many do they each get?


Find the coordinates of the point of intersection of the lines y = 3x - 2 and x + 3y = 1.


Renee buys 5kg of sweets to sell. She pays £10 for the sweets. Renee puts all the sweets into bags. She puts 250g of sweets into each bag. She sells each bag of sweets for 65p. Renee sells all the bags of sweets. Work out her percentage profit.


Find the volume of a cone with radius 13cm and with a perpendicular height of 9cm.


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