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The answer is -3x + 2 + 9/(2x-3). That is A = -3, B = 2 and C = 9.

I will use the whiteboard during my interview to explain the working.

We need to start by translating the sentences into algebraic equations. There are 2 unknowns, Christine’s money and David’s money. Let Christine’s money= x Let David’s money = y If Christine gave David £3...

Remember that both sides of the equation need to 'balance', so any changes that we make to the right hand side must also be made to the left hand side. 

Let's start by getting rid of the '5' on the...

I will attach a file with the solution during the interview because it is difficult to type the solution in here.

There are 2 easiest and quickest ways to approach this question:

1). By elimination:

When using the elimination method, you want to make sure that you choose the correct varia...