If it's a guy, just do me a favor, equation A person has 19 apples. Let his wife divide them into four parts. After a while, he doubled the first part, increased the second part by one, decreased the third part by two, and reduced the fourth part by half. After that, the number of apples in the four parts will be the same again. How can I share the 19 apples?

If it's a guy, just do me a favor, equation A person has 19 apples. Let his wife divide them into four parts. After a while, he doubled the first part, increased the second part by one, decreased the third part by two, and reduced the fourth part by half. After that, the number of apples in the four parts will be the same again. How can I share the 19 apples?

Let a be divided into four parts: A, B, C, D
2a=b+1=c-2=d/2
a+b+c+d=19
Then take the first formula into the second one
（b+1)/2+b+b+3+2(b+1)=19
So B = 3
a=2 c=6 d=8