Answer :

Lilith
[tex]p=2m+2w \ \ |-2w \\ \\ p-2w=2m +2w -2w \\ \\ p-2w =2m \ \ |:2 \\ \\m=\frac{p}{2}-\frac{2w}{2}\\ \\m=\frac{p}{2}-w[/tex]


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