I need to discover steps to solve this expression: (3x+12)/(x+4)

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I need to discover steps to solve this expression: (3x+12)/(x+4)

Mathematics
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What do you mean solve? There is nothing to solve here. e.g. no = sign.
He probably means to "SIMPLIFY".
simplified or divide is better: 3(x+4)/(x+4)

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Other answers:

simplify* it is not only better to say it is accurate to say in this case
You don't need to discover anything, someone already did. Just take 3 as a common factor of the numerator, and then (x+4) will be cancelled from the top and bottom as: \[{3x+12 \over x+4}={3(x+4) \over x+4}\]
=3
this expression =3 as long as x does not equal -4
Not really. It's always 3, for any value of x (including -4).
no what happens if you plug in -4 into the original expression
It wouldn't affect the value. Try graphing the function. It's nothing but a horizontal line at y=3.
its good to point stuff out like this early because when start talking about continuity in calculus they are going to find out f(-4) DNE but the limit has x approaches -4 exist which is 3 in this case i never had a calculator to graph holes

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