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m in (-oo:+oo)
7/4 = 2*m+1/9 // - 2*m+1/9
7/4-(2*m)-(1/9) = 0
7/4-2*m-1/9 = 0
59/36-2*m = 0 // - 59/36
-2*m = -59/36 // : -2
m = -59/36/(-2)
m = 59/72
m = 59/72
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