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Marco = 4jacobo (2)
Reemplazas (2) en (1)
Jacobo + marco = 250$
Jacobo + 4 Jacobo = 250$
5jacobo = 250$
Jacobo = 250/5
Jacobo = 50$
Reemplazas Jacobo en (2)
Marco = 4 jacobo
Marco = 4×50 $
Marco = 200$