Question

书店运来一批畅销书,第一天卖出比这批书的1/6少十五本,这时还剩7/8没有卖,用方程解.

Answer 1

解,设这批书共有x本,则：

x -(1/6x - 15 )= 7/8 x

x - 1/6 x - 7/8 x = -15

x - 25/24 x =-15

1/24 x =15

x = 360