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m in (-oo:+oo)
3/8 = 2*m+m+3/8 // - 2*m+m+3/8
3/8-(2*m)-m-(3/8) = 0
3/8-2*m-m-3/8 = 0
-3*m = 0 // : -3
m = 0
m = 0
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