For example 2x - 1 9 is an equation that is true for x 5. An inequality that is true for some values of the variables and not. Normally known simply as equations as opposed to identities which is true regardless of contexts.
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Learn about literal equations with this tutorial. An equationwhich is only true under certain contexts. The biconditional p q represents p if and only if q where p is a hypothesis and q is a conclusion. Literal equations allow use to represent things like distance time interest and slope as variables in an equation.