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Por lo tanto:
2X + Y = 1840
6x + Y = 2950
Despejando Y= 1840 - 2X
6X + 1840 - 2X = 2950
4X = 2950 - 1840
X = (2950 - 1840)/4
X = 277.5
Y= 1840 - 2(277.5)
Y= 1285
Por lo tanto, cada silla cuesta 277.5 y cada mesa 1285