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m in (-oo:+oo)
(m-17)/5-((2*m-8)/4) = 1 // - 1
(m-17)/5-((2*m-8)/4)-1 = 0
(m-17)/5+(-1*(2*m-8))/4-1 = 0
(4*(m-17))/(4*5)+(-1*5*(2*m-8))/(4*5)+(-1*4*5)/(4*5) = 0
4*(m-17)-1*5*(2*m-8)-1*4*5 = 0
-6*m-28-20 = 0
-6*m-48 = 0
(-6*m-48)/(4*5) = 0
(-6*m-48)/(4*5) = 0 // * 4*5
-6*m-48 = 0
-6*m-48 = 0 // + 48
-6*m = 48 // : -6
m = 48/(-6)
m = -8
m = -8
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