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m in (-oo:+oo)
4*m-7 = -61/11 // + -61/11
4*m-(-61/11)-7 = 0
4*m+61/11-7 = 0
4*m-16/11 = 0 // + 16/11
4*m = 16/11 // : 4
m = 16/11/4
m = 4/11
m = 4/11
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