解法是;75-5/8x+3/7x=64 移项 75-64=5/8x-3/7x 11=5/8x-3/7x ,两边乘56,得;35x-24x=11X56, 11x=11X56,x=56
5/8x -3/7x=75-6411/56x=11x=56