若a=-98.125,b=12.5,c=-17/8a=-98.125,b=12.5,c=-1又7/8 a+b+c=?
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若a=-98.125,b=12.5,c=-17/8a=-98.125,b=12.5,c=-1又7/8a+b+c=?若a=-98.125,b=12.5,c=-17/8a=-98.125,b=12.5,c
若a=-98.125,b=12.5,c=-17/8a=-98.125,b=12.5,c=-1又7/8 a+b+c=?
若a=-98.125,b=12.5,c=-17/8
a=-98.125,b=12.5,c=-1又7/8 a+b+c=?
若a=-98.125,b=12.5,c=-17/8a=-98.125,b=12.5,c=-1又7/8 a+b+c=?
a=-98又1/8,c=-1又7/8,则a+c=-98,
所以a+b+c=12.5-98=-85.5
-87.5