4x+3.6﹦8x－4.8
3.6+4.8=8x-4x
4x=8.4
x=2.1
75(x-0.75)=60x
75x-75×0.75=60x
75x-60x=75×0.75
15x=75×0.75
x=5×0.75
x=3.75