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step 1 ; expand the brackets5x - 15 = 4y - 3xystep 2 ; group together x values on one side5x + 3xy = 4y + 15step 3 ; single out xx (5+3y) = 4y +15step 4 ; make x the subjectx = (4y + 15) / (5+3y)

In questions involving hyperbolic functions and natural logs, it is often useful to rewrite things in terms of e, since then you might be able to take a natural log at the end of your answer. Here, we can...

The Demographic Transition Model is one of the main ways we can easily understand how a population will change demographically as countries go through economic and social change. It was originally develop...

Questions about speciation are at their core based on Darwin's theory of evolution. As a result, we must recall GCSE knowledge of natural selection to combine with the new concepts in speciation introduce...

Firstly, we need to decide what the main factors were. They can be defined as the failure of the Provisional Government, the role of Lenin and the Bolsheviks and WW1. Ultimately, Lenin and the Bolsheviks ...