v/2=8
16
-17=x-15
x=-2
x-7=13
20
v/4 +2 = -2
v=-16
-15x=0
10-6v=-104
v=16
-2+x=8
x=10
-6 + x/4 = -5
x=4
-17x=-204
x=12
10(k-9) = -10
k=8