1: According to "If Party A gives 45 copies to Party B, the account books of both are equal", it can be known that Party A has more than Party B: 45+45=90 copies.

According to "If Party B gives 45 copies to Party A, the number of copies of Party A is twice that of Party B", at this time, the number of copies of Party B is: 90+45+45= 180;

Therefore, A originally had: 180×2-45=3 15 copies.

B Originally: 180+45=225.

2. solution: let b do x direction. Then, A did (x+6) and C did (x+22).

x+22=2*(x+6)

x= 10

So, A made x+6= 10+6= 16 (pottery).

C did x+22= 10+22=32 (Tao)

Three people and one * * * did it 10+ 16+32=58 (Dao).

A: Three people did 58 math problems.

3: If it takes X days to finish spraying peach trees, there will be 15x peach trees and 25x apple trees sprayed with pesticides. The number of apple trees in the orchard is three times that of peach trees, so there are 3× 15x=45x apple trees in the orchard. There are 140 apple trees without spraying, so 45x-25x= 140.

X=7 is obtained by solving. therefore

There are15x =15x7 =105 peach trees in the orchard.

There are 45x = 45x7 = 3 15 apple trees in the orchard.

So there are 105+3 15=420 trees in the orchard.