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x in (-oo:+oo)
4 = (x+43)/8 // - (x+43)/8
4-((x+43)/8) = 0
(-1*(x+43))/8+4 = 0
(-1*(x+43))/8+(4*8)/8 = 0
4*8-1*(x+43) = 0
-x-11 = 0
(-x-11)/8 = 0
(-x-11)/8 = 0 // * 8
-x-11 = 0
-x-11 = 0 // + 11
-x = 11 // * -1
x = -11
x = -11
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