Three Simultaneous Equations Exam Question Solutions

In this video I give full solutions to the exam questions on three simultaneous equations.

0:00 Intro
0:10 Q1
2:52 Q2
5:09 Q3
7:37 Q4
10:06 Q5
11:55 Q6

[davmagg]

I dont know why but i struggle with these so much, my teacher taught me to just find a in terms of b and c and plug that in to the others to make a normal simultaneous equation but your way seems to have a much higher success rate

[pranaydave]

I was struggling on this topic and you really helped me. Thank you

[jemimahleah-ytko]

I understood it very well. Thank you very much

[Dean-ig]

@1st class maths I am confused because I tried Q1 and I got a= -9, b = 20 and c= 21 and I substituted them in and it works, however you got a= 5, b= 2 and c = 1. So is there more than one answer?!?! and in the exam will this be considered. Please let me know when you can. Thank you!

[sumayahali]

How do I know when to add or minus the equations because there are three symbols, is there a rule i need to know.