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

The video tutorial explains how to solve a pair of simultaneous equations by eliminating variables. The teacher demonstrates the process of eliminating X, solving for Y, and then substituting Y back into the original equation to find X. The tutorial emphasizes understanding the mechanical routine of solving such equations and highlights the marking scheme for the problem.

What is the first step in solving the given simultaneous equations?

• Substitute values directly

• Eliminate one of the variables

• Solve for Y first

• Use a calculator for all operations

After eliminating X, what is the resulting equation for Y?

• 3Y = -6

• Y = 0

• 5Y = -10

• Y = 2

What value of Y is obtained after solving the equation?

• Y = -1

• Y = 0

• Y = 2

• Y = -2

How do you find the value of X after determining Y?

• Use a different set of equations

• Use the second equation only

• Guess the value of X

• Substitute Y into one of the original equations

What is the final value of X in the solution?

• X = 1

• X = -2/3

• X = 0

• X = -2