If it doesn't have an "equals" sign, then it's not an equation.
It's an "expression".
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Equation
A mathematical sentence that contains an equals sign would be called an equation.
An equation. (Both "equals" and "equation" have the Latin root aequatio.)
That is called an equation. An equation has an equal sign (=), and expressions on both sides of the equal sign.
if it has an equal sign then it is an equation