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z in (-oo:+oo)
2 = (z+10)/(-3) // - (z+10)/(-3)
2-((z+10)/(-3)) = 0
(-1*(z+10))/(-3)+2 = 0
(-1*(z+10))/(-3)+(-3*2)/(-3) = 0
-1*(z+10)-3*2 = 0
-z-16 = 0
(-z-16)/(-3) = 0
(-z-16)/(-3) = 0 // * -3
-z-16 = 0
-z-16 = 0 // + 16
-z = 16 // * -1
z = -16
z = -16
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