Simple inequalities using algebra
People usually think of letters in algebra standing for one unknown amount. However, the letter could actually stand for a range of values, and we can represent this using inequality notation.
For example, the inequality x > 2 means that the value of x is greater than 2. This means x could be any value that is greater than 2, including decimals and fractions. So x could be 2.5, 3, 3.76, 10, 1000... and so on up to infinity. However, the symbol > means that x must be greater than 2; in other words, it can't actually equal 2. If we use the symbol ≥ instead, this means that x is greater than or equal to 2. So x can be all of the values we just talked about, but it could also actually equal 2. Sometimes in exam questions you might be asked to give integer values that satisfy an inequality. Integer just means "whole number", so in this case, you would only write down the whole number values that satisfy the inequality. 
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