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aw + 3 = 4(bw + 5) Let's get rid of those brackets... aw + 3 = 4bw + 20 Now we rearrange... aw - 4bw = 17 Factorise... w(a - 4b) = 17 Final rearrange... w = 17 / (a - 4b) Done.

Giant covalent structures are made up of many covalent bonds between atoms. They have high melting points because it takes a lot of energy to break the strong covalent bonds between the atoms. They cannot co...

Both these processes involve the movement of molecules from an area of high concentration to low concentration. They are also both passive processes, so happen without the use of chemical energy. However, os...

Introduction - Give background to why liberalism was a relevant concept, placing its ascent in the broader context of socio-economic change. Present a clear and coherent sense of your argument, whilst also s...

It is essential to first check the weighting of the assessment criteria to cater your essay to the dominant assessment objectives. For example, in OCR English A-Level, 50% of the marks are for " underst...