已知5x+0.8=19.3,则3x+12=( ),( )/x=2

问题描述:

已知5x+0.8=19.3,则3x+12=( ),( )/x=2

已知5x+0.8=19.3,
x=3.7
则3x+12=(23.1 ),(7.4 )/x=2