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When solving an equation with brackets, it is often easiest to expand the brackets first.3(x+1) = 21becomes...3x + 3 = 21Now this looks like an equation we know how to solve(minus three from both sides)3x...

The best way to structure your essay is to break your essay up into roughly three sections. An introduction section. A main body section. And then a conclusion section.
Your introduction should brief...

Our ultimate goal is to figure out what m equals.The most important thing to remember is that whatever you do to the left you also do to the right.Let us start by adding 4m to both sides: 5m+4m-2=16-4m+4 ...

1. Some types e.g. macrophages can engulf and digest pathogens, killing them
   2) Produce antibodies which recognise and target specific pathogens, thus preventing secondary infection
   3) Produc...

Introductions are the most important parts of essays at A-level. While knowing your content is important, the way that you structure essays is the most crucial thing you can learn to make sure that you a...