It can't. 9 x 1/4 = 2 and 1/4. The equation in the question is a false statement.
-40 +2n= 4n -8(n+8)
-40 +2n= 4n -8n -64
-40 + 2n = -4n -64
2n = -4n -64 +40
2n=-4n-24
2n+4n=-24
8n=-24
N= -3
Answer is n equals -3
-10 and -2
Because -10-2= -12 and -10 x -2 = 20
Hope this helps :)
