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m in (-oo:+oo)
m/150 = 21/25 // - 21/25
m/150-(21/25) = 0
m/150-21/25 = 0
1/150*m-21/25 = 0 // + 21/25
1/150*m = 21/25 // : 1/150
m = 21/25/1/150
m = 126
m = 126
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