7m + 9p - 16m - p n - ( 23 - n ) + (-n + 35)

Question

7m + 9p - 16m - p
n - ( 23 - n ) + (-n + 35)

Answer 1

7m+9p-16m-p= (7-16m)+(9p-p)= -9m+8p
n-(23-n)+(-n+35)= n-23+n+(-n)+35=-n=12