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Write x in terms of y using one of the equations. Then substitute it in the second equation, which is then only in terms of y. Find y. Then you can easily find x. Answer: x = 6 and y = 4.

When structuring an essay in an exam, it can sometimes be daunting to know where to start. But remembering the simple trick PEEL can be very helpful and make your paragraphs more clear and help the examiner ...

The easiest way to solve simultaneous equations is by elimination. This is the idea of cancelling out one of your variables, the X or Y so that you can solve the remaining variable and then substitute this a...

To answer this you multiply everything in the left bracket by everything in the right bracket, so rewrite the equation as x(x+3)+4(x+3). Then you can expand each more easily: x(x+3) = x 2 +3x 4(x+3) = 4x+4×3...

You should always look at the number of marks offered for each question to help indicate to you how many points you should include in your answer. For example, for a 3 / 4 mark source question it would be go...