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m in (-oo:+oo)
(2/5)*(15*m-10)-(3*(5*m-(7*(2*m-3))+11)) = 0
(2/5)*(15*m-10)-3*(5*m-7*(2*m-3)+11) = 0
2/5*(15*m-10)-3*(5*m-7*(2*m-3)+11) = 0
2/5*(15*m-10)-3*(5*m-7*(2*m-3)+11) = 0
33*m-100 = 0
33*m-100 = 0
33*m-100 = 0 // + 100
33*m = 100 // : 33
m = 100/33
m = 100/33
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