We use equations to help us solve for x. Therefore there must be a equal sign for it to be an equation. For example: 3-4=x. This is a basic equation. A more complicated equation would probably be something like this: 3b+4=28. Then you would need to find b before you find x.
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They use rational equations for fun in the evening to relax.
well, if you know all the formulating equations it will make you better at regular equations and regular equations can be used in everyday life
The idea is to work with the same variables, but it is possible that some of the variables are missing in some of the equations.
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Why? - Mainly to help in solving equations.