解方程3x+4x0.8=8解:3x+3.2=8 3x=4.8 x=4.8÷3 x=1.6
3x=8-3.23x=4.8x=4.8÷3x=1.6
3x+3.2=83x=8-3.23x=4.8x=1.6
解:3x+4x0.8=83x=8-4×0.83x=8-3.23x=4.8x=4.8÷3x=1.6