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m in (-oo:+oo)
2*(3*m+3) = 48 // - 48
2*(3*m+3)-48 = 0
2*(3*m+3)-48 = 0
6*m-42 = 0
6*m-42 = 0
6*m-42 = 0 // + 42
6*m = 42 // : 6
m = 42/6
m = 7
m = 7
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