Solve algebraically: 6a+b = 16 and 5a - 2b = 19

6a + b = 16 (1)

5a - 2b = 19 (2)

(1) x 2: 12a + 2b =32

(1) + (2): 12a + 2b + 5a - 2b = 32 + 19 = 51

17a = 51

a = 51 / 17 = 3

Substitue a = 3 back into (1): (6 x 3) + b = 16

18 + b = 16

b = 16 - 18 = - 2

Substitute a = 3 and b = -2 into (2) to check

(5 x 3) - (2 x - 2) = 19

15 - - 4 = 15 + 4 = 19

Answered by Niva R. Maths tutor

2508 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

x^2+10x+6=0 Find x


Expand x(x+2)


Solve simultaneously, 2x-3y=16 and x+2y=-6


A graph of a linear equation passes through 2 points, (2,9) and (-3,-1). Find the equation of the line in the form y=mx+c.


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
Cookie Preferences