What's the key to solving simultaneous equations?

With simultaneous equations, a lot of the maths GCSE qualification, the best approach is to work things out step by step and write every step you take down on your exam paper. This does seem like its time consuming and tedious but it always helps my mind follow through on the method that I'm using to solve the equation. I always approach simultaneous equations with the impression that I will solve them by substitution, and use the elimination method where I've spotted that it can be done easily.
When I was in school many students tried to use the elimination method as a way of avoiding substituting because they're under the impression that it is more difficult. Though it is the may be the more difficult method, substituting can help you solve almost any simultaneous equation. Practice solving equations by substitution (remember the key is to write every step you do) and simultaneous equations will become second nature in maths.

DI
Answered by David I. Maths tutor

2885 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

f(x)=2x^2 -8 What is the value of x if f(x)=0, x>0


What is 17% of 84?


At what points does the line y = x +1 intersect the circle x^2 + y^2 + 18x + 20y + 81 = 0.


There are only red , blue and purple counters in a bag. The ratio of the number of red counters to the number of blue counters is 3 : 17. If a counter is taken randomly the probability that it is purple is 0.2 Work out the probability for it to be red.


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences