Simultaneous equations revision

Simultaneous equations are about finding values that satisfy two equations at the same time. The topic becomes easier when students use a reliable method.

Start with elimination

For many GCSE questions, elimination is the clearest method. Match one coefficient, add or subtract the equations, then substitute back to find the other variable.

Keep working aligned

Neat layout matters. Lining up terms helps students avoid sign errors and makes substitution clearer.

Check both equations

Once values are found, substitute them into both original equations. This is a quick way to catch mistakes.

Move to graphs and quadratics

Higher tier questions may connect simultaneous equations to graphs or include one linear and one quadratic equation.

FAQs

What is the easiest method for simultaneous equations?

Elimination is often the most reliable starting point for linear simultaneous equations.

How do I avoid sign errors?

Use clear layout, write every step and check answers in the original equations.