10乘以5=50,50+6=56,56除以7=8,8-3=5,这个数是5
某数加上3,乘以7,再减去6,最后除以5等于10[7(x+3)-6]/5=107(x+3)-6 =507x+21=657x=44x=44/7
【(5+3)×7-6】÷5=10
(10*5+6)/7-3=5
5