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m/5 + 8 = -7 m/5 = -15 m = -15 x 5 m = -75
5/8 plus m = 1 easy4/4=167/67=18/8=1m=3/8
(15/m) - m + 8 = 1015/m - m = 215 - m2 - 2m = 0 or m2 +2m - 15 = 0This factoises as (m +5)( m - 3), so m = 3 or -5
8 km is longer then 8 m as 5 m then 5 mm
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