3m-2n-9+(6m)-12n+7 plz plz plz plz plz plz plz plz plz plz plz plz pzl zplz plz plz plz plz plz plz plz plz plz plz plz plz plz plz pl plz plz plz plz plz plz plz plz plz plz plz plz plz plz help me

Answer :

Answer:

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${teks-lihat-gambar} Аноним
secondeye

the answer is 9m−14n−2