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m in (-oo:+oo)
-7*m-4 = -37/11 // + -37/11
-7*m-(-37/11)-4 = 0
37/11-7*m-4 = 0
-7*m-7/11 = 0 // + 7/11
-7*m = 7/11 // : -7
m = 7/11/(-7)
m = -1/11
m = -1/11
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