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x in (-oo:+oo)
-2.195 = (x-540)/100 // - (x-540)/100
-((x-540)/100)-2.195 = 0
(-1*(x-540))/100-2.195 = 0
(-1*(x-540))/100+(-2.195*100)/100 = 0
-1*(x-540)-2.195*100 = 0
320.5-x = 0
(320.5-x)/100 = 0
(320.5-x)/100 = 0 // * 100
320.5-x = 0
320.5-x = 0 // - 320.5
-x = -320.5 // * -1
x = 320.5
x = 320.5
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