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Fernando x/2
alfredo x/7
lety 2000
x/2+x/7+2000=x
2000=x-x/2-x/7
2000=(14x-7x-2x)/14
2000=5x/14
28000=5x
x=5600
BLAS tenia $5600
Comprobación
5600/2+5600/7+2000=5600
2800+800+2000=5600
5600=5600