Solve the simultaneous equation 3x – y = 3 and 9x² – y² = 45

The three major Nigerian languages belong to different families. Hausa (Afro-Asiatic family) has grammatical gender, complex verb conjugation, and tonal distinctions. Written in both Latin and Arabic scripts historically.

Igbo (Niger-Congo family) is highly tonal with vowel harmony. Many dialects with varying mutual intelligibility. Written standardization relatively recent.

Yoruba (Niger-Congo family) is tonal with three tones. Rich oral literature tradition. Writing developed with missionaries in 19th century. All three serve millions of speakers and are used in media, education, and government.