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m in (-oo:+oo)
-(4*m)-2 = m-22 // - m-22
22-(4*m)-m-2 = 0
22-4*m-m-2 = 0
20-5*m = 0 // - 20
-5*m = -20 // : -5
m = -20/(-5)
m = 4
m = 4
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