60*0.8+1.2*x=0.88*(60+x) 48+1.2*x=52.8+0.88*x 0.32*x=4.8 x=15
解:60X0.8+1.2x=0.88(60+x)48+1.2x=52.8+0.88x1.2x-0.88x=52.8-480.42x=4.8x=11.43