Current location - Training Enrollment Network - Mathematics courses - Mathematical selling price
Mathematical selling price
Solution: If the store buys X pairs of slippers, it sells (x-5) pairs.

The cost of buying all slippers is 6.5x yuan, and the money for selling shoes is 12(x-5) yuan.

According to the meaning of the question, it is: 12(x-5)-6.5x= 105.

To solve this equation, x=30.

A: The store bought 30 pairs of slippers.

**********************************************

Naughty and smiling went to buy fruit. Naughty bought a basket of apples at 1 and smiling bought a basket of pears at 1.

What percentage of the sum of this basket of apples and pears did they buy?

Solution: Suppose a basket of apples ***a and a basket of pears * * * B.

Naughty bought an a/6 apple and smiled and bought a b/3 pear.

Therefore, the ratio of two fruits to total fruits is: (a/6+b/3)/(a+b)=(a+2b)/[6(a+b)].

You must also know the multiple/score relationship between a basket of apples and a basket of pears before you can calculate the result.