GCSE Secondary Maths Age 13-17 - Algebra: Simultaneous Equations - Explained

The video tutorial explains how to solve simultaneous equations using the elimination method. It begins by introducing the concept and importance of solving such equations. The teacher presents two equations and demonstrates the process of eliminating variables to find the values of X and Y. The tutorial emphasizes the importance of following a set process to achieve full marks and highlights common mistakes students make, particularly with negative signs.

What is the first step in solving simultaneous equations according to the video?

• Guessing the values of X and Y

• Eliminating one of the variables

• Adding both equations directly

• Multiplying both equations by the same number

Why does the teacher choose to eliminate Y instead of X?

• To avoid dealing with negative signs

• To make the equations identical

• Because it involves fewer calculations

• Because Y is already isolated

After eliminating Y, what is the value of X?

• -3/2

• 2/3

• 3/2

• -2/3

What is the value of Y after substituting the value of X?

• -2

• 2

• -4

• 4

How many marks are awarded for correctly solving the simultaneous equations?

• Two marks

• Four marks

• Three marks

• One mark