..... is still very simple. This is just a one-dimensional linear equation.

The orchard area is 120 X 80 =9600.

Taoyuan width: 80-(80×5/8)= 30.

Then the area of Taoyuan is: 60 X 30 = 1800.

The area and taste of pear orchard and apricot orchard: 9600—( 1800+4000)=3800.

Let the width of pear orchard be x and the length of apricot orchard be 120-60=60.

40x+60x(80x)= 3800

X =50

It is as wide as a pear garden. You do the rest yourself.

Forgive my laziness.