(1/6)s-((1/2)(s-2)) = 45/2 // - 45/2
(1/6)s-((1/2)(s-2))-(45/2) = 0
(-1/2)(s-2)+(1/6)s-45/2 = 0
s/6-1/2(s-2)-45/2 = 0
(-1/226(s-2))/(26)+(2s)/(26)+(-456)/(26) = 0
2s-1/226(s-2)-456 = 0
12-4s-270 = 0
-4s-258 = 0
(-4s-258)/(26) = 0
(-4s-258)/(26) = 0 // 26
-4s-258 = 0
-4s-258 = 0 // + 258
-4*s = 258 // : -4
s = 258/(-4)
s = -129/2
s = -129/2
