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m in (-oo:+oo)
(-2/3)*((6/5)*m-(7/10)) = 17/20 // - 17/20
(-2/3)*((6/5)*m-(7/10))-(17/20) = 0
(-2/3)*((6/5)*m-7/10)-17/20 = 0
-2/3*(6/5*m-7/10)-17/20 = 0
(-2/3*20*(6/5*m-7/10))/20-17/20 = 0
-2/3*20*(6/5*m-7/10)-17 = 0
-16*m-23/3 = 0
(-16*m-23/3)/20 = 0
(-16*m-23/3)/20 = 0 // * 20
-16*m-23/3 = 0
-16*m-23/3 = 0 // + 23/3
-16*m = 23/3 // : -16
m = 23/3/(-16)
m = -23/48
m = -23/48
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