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m in (-oo:+oo)
6*m-(2*m)+4 = 52 // - 52
6*m-(2*m)-52+4 = 0
6*m-2*m-52+4 = 0
4*m-48 = 0 // + 48
4*m = 48 // : 4
m = 48/4
m = 12
m = 12
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