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m in (-oo:+oo)
(3/4)*m = (2/7)*(2*m+1) // - (2/7)*(2*m+1)
(3/4)*m-((2/7)*(2*m+1)) = 0
(-2/7)*(2*m+1)+(3/4)*m = 0
(3*m)/4-2/7*(2*m+1) = 0
(-2/7*4*(2*m+1))/4+(3*m)/4 = 0
3*m-2/7*4*(2*m+1) = 0
5/7*m-8/7 = 0
(5/7*m-8/7)/4 = 0
(5/7*m-8/7)/4 = 0 // * 4
5/7*m-8/7 = 0
5/7*m-8/7 = 0 // + 8/7
5/7*m = 8/7 // : 5/7
m = 8/7/5/7
m = 8/5
m = 8/5
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