已知5x+0.8=19.3,则3x+12=（ ),( )/x=3

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已知5x+0.8=19.3,则3x+12=（),()/x=3已知5x+0.8=19.3,则3x+12=（),()/x=3已知5x+0.8=19.3,则3x+12=（),()/x=3已知5x+0.8=1

已知5x+0.8=19.3,则3x+12=（ ),( )/x=3
已知5x+0.8=19.3,则3x+12=（ ),( )/x=3

已知5x+0.8=19.3,则3x+12=（ ),( )/x=3
已知5x+0.8=19.3,
x=3.7
则3x+12=（23.1 ）,（11.1 ）/x=3