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m in (-oo:+oo)
m+m+2/4-(2/2) = 8 // - 8
m+m+2/4-(2/2)-8 = 0
m+m+2/4-8-1 = 0
2*m-17/2 = 0 // + 17/2
2*m = 17/2 // : 2
m = 17/2/2
m = 17/4
m = 17/4
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