I assume you mean "inequality". An equation has an equal sign; an inequality has one of the inequality signs instead of an equal sign. These signs are:
* Greater than
* Greater than or equal
* Less than
* Less than or equal
To solve an inequality, the main point to consider is that if you multiply or divide both sides by a negative number, you must invert the inequality sign. For example, if you multiply both sides by (-2), a greater-than sign would need to be changed to a less-than sign.
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Expression has no answer. a equation has an answer
an equation has an equals sign.
An expression has no equal sign whereas an equation does have an equal sign
Difference in math means subtraction. To express the difference between 6 and 2 you would use the equation 6 - 2 = 4.
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