设t=(x-1)/x,则(7x-7)/2x=7t/2
所以t-7t/2+3=0
即t=6/5
所以(x-1)/x=6/5
x=-5步骤再完善一点好吗？设t=(x-1)/x，则(7x-7)/2x=7t/2所以t-7t/2+3=05t/2=3所以t=6/5因此(x-1)/x=6/56x=5x-5故x=-5