Simultaneous Equations
IGCSE 0580
Topic: Algebra and Graphs
Core: C2.5
Solve simultaneous linear equations in two unknowns.
(change the subject of formulas where the subject only appears once)
Extended: E2.5
Solve simultaneous linear equations in two unknowns.
(change the subject of formulas where the subject appears twice)
Simultaneous Equations Intro
In this video we'll look at why there is a need for 2 equations when trying to solve equations with 2 variables.
Solve Simultaneous Equations Graphically
In this video we'll look at how to solve Simultaneous Equations Graphically by drawing them on a grid.
Forgot how to draw linear functions?
Simultaneous Equations by Substitution (easy)
In this video we'll look at how to solve Simultaneous Equations by substituting one equation into the other. This is more accurate that the graphical method.
Simultaneous Equations by Substitution (easy-ish)
In this video we'll look at how to solve Simultaneous Equations Algebraically by using the Substitution method.
Simultaneous Equations by Eliminations (easy)
In this video we'll look at how to solve Simultaneous Equations Algebraically by using the Elimination method.
Solve Simultaneous Equations by Eliminations (tricky)
In this video we'll look at how to solve Simultaneous Equations Algebraically by using the Elimination method.
Past paper examples
In this video we go through some past paper examples. Download them below.
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Past paper examples (with quadratic equations)
In this video we go through some past paper examples. Download them below.
Past Paper Questions
Here are some more past paper questions that you can try on your own.
Some of them have quadratics in them - I'll make video on how to solve them a little later.
