79 + k = 84
84 - 79 = k
k = 5
77
7x + 8 = 84 7x = 84 - 8 x = 76/7 x = 10.8571
n= -2
7
x=7
v = -6
p is obviously zero because any number x plus 0 equals itself.
you do 3 plus 5 first then you get 8 you have to find out what minus 7 equals 8
9y subtract 11 equals 7
It does not help you.
y=7+x =x=7-x
If n + 7 = 12, then n = 12 - 7