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m in (-oo:+oo)
(4*m)/17 = 52/255 // - 52/255
(4*m)/17-(52/255) = 0
(4*m)/17-52/255 = 0
4/17*m-52/255 = 0 // + 52/255
4/17*m = 52/255 // : 4/17
m = 52/255/4/17
m = 13/15
m = 13/15
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