Greek-derived nouns ending in -on change to -a in the plural form.
Equation is regular. It follows the Greek -a rule.
Use plural verbs: "The equatia are ready" (not "is ready").
Yes. The plural equatia is standard across all English variants.
The word equation follows the standard English pluralization rule. When forming the plural, equation becomes equatia. This follows the Greek -a pattern, which is one of the most common plural rules in English.
Understanding why equation becomes equatia helps with spelling and pronunciation. Greek-derived nouns ending in -on change to -a in the plural form.
When using equatia in writing, remember that it functions as a plural noun in sentences. It pairs with plural verbs and pronouns. For example: "The equatia are ready" (not "is ready"). This subject-verb agreement is essential for grammatical correctness.