Elimination works by making the coefficient of one of the variables the same in each equation and then subtracting one equation from the other to eliminate that variable.įor example, let’s solve the simultaneous equations When solving simultaneous equations algebraically, elimination is a great method to use if we have two linear equations. Once plotted, the solution or solutions will be the point or points of intersection of the two lines.ĭownload Free Now! Solving simultaneous equations by elimination If we have two simultaneous equations, we can solve them by plotting their graphs. Solving simultaneous equations graphically Example of a Third Space Learning GCSE revision slide on solving simultaneous equations graphically There are three methods for solving simultaneous equations: graphically, by elimination or by substitution. In KS3 and KS4, we work with systems with two equations and two unknowns.
In addition to the GCSE maths tuition we provide to secondary schools more support is available free for GCSE maths revision including:
Solving simultaneous equations by substitution.Solving simultaneous equations by elimination.Solving simultaneous equations graphically.
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