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Math equations have an equals sign such as: 7+5=12 or 9x6=47+7 Math expressions do not have a equals sign such as: 43-27 or 8x40
If it has an equals sign it is called an equation. without an equal sign is called and expression because it expresses what is happening for example. x^2*x*1 is just an expression stating something u don't actually have an answer.
All expressions DO contain equals signs.
An equation has the 'equals' sign ( = ) in it. An expression hasn't.
That is called an equation. An equation has an equal sign (=), and expressions on both sides of the equal sign.