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m in (-oo:+oo)
2*m+(1/2)*m+3 = -22 // + 22
2*m+(1/2)*m+3+22 = 0
5/2*m+25 = 0 // - 25
5/2*m = -25 // : 5/2
m = -25/5/2
m = -10
m = -10
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