Why does the author include his own memories in the book? to connect his identity to the kiowa people as a whole to invite readers to write their own memoir to explain how he became a university professor to disprove much of what the anthropologist says

substitute y = 2x - 4 to x + 2y = 12:

x + 2(2x - 4) = 12     use distributive property

x + (2)(2x) + () = 12

x + 4x - 8 = 12     add 8 to both sides

5x = 20     divide both sides by 5

x = 4

put the value of x to the first equation:

y = 2(4) - 4

y = 8 - 4

y = 4

i don't see any right answer. i don't know english and only math