解:设做对x题,则做错了(10-x)题列出方程:8x-5(10-x)=41,解得x=7答:他做对7题。望采纳!
设他做对了x道题8x-5(10-x)=418x-50+5x=4113x=91x=7他做对了7道题
(8×10-41)÷(8+5)=3(道)10-3=7(道)
8x-5*(10-x)=41x=7