Respuesta :

[tex]ma=n-p[/tex],   original equation

[tex]\frac{ma}{m} =\frac{n-p}{m}[/tex],   divide m on both sides, m's on the left side will cancel out.

[tex]a=\frac{n-p}{m}[/tex],   final answer

If you need any further help, please ask me :)