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m in (-oo:+oo)
m-9 = 35-3*m // - 35-3*m
m-(-3*m)-35-9 = 0
m+3*m-35-9 = 0
4*m-44 = 0 // + 44
4*m = 44 // : 4
m = 44/4
m = 11
m = 11
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