In the mending wall who has an apple orchard on his property

The speaker is the one who has the apple orchard on his property.

the author or the poet is the one that has an apple orchard.

Explanation: in " the Mending Wall" by Robert Frost, the author gives an insight of his childhood in New England. In the poem the author says: "...There where it is we do not need the wall:  He is all pine and I am apple orchard. ..".

he will find out what went wrong or happened and how.

x=4, y=4

step-by-step explanation:

y=2x-4;

x+2y=12

we can use substitution since the first equation is solved for y

where ever you see y in the second equation, replace it with 2x-4

x + 2(2x-4) = 12

distribute the 2

x+4x-8 = 12

combine like terms

5x-8=12

add 8 to each side

5x-8+8=12+8

5x=20

divide by 5

5x/5 = 20/5

x =4

we still need to solve for y

y = 2x-4

we know x =4

y = 2(4) -4

y = 8-4

y=4