(5m-n+1): 1/3
(5m-n+1)x3
15m-3n+3
[tex](5m-n+1):\frac{1}{3} =(5m-n+1)\cdot\frac{3}{1} = 5m\cdot3 -n\cdot3+1\cdot3 = 15m-3n+3[/tex]
