Sistema de 2 ecuaciones con 2 incognitas metodo de sustitucion
₍ 3x+y= 12 ₎
₍-y + 9x =0₎
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Answer:
3x+y=12+y+9x=0
Step-by-step explanation:
3x+y=12+y+9x=0 =adding eqn 1 and 2
6x+y²+12
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