Respuesta :

Step-by-step explanation:

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Answer:

[tex]p=12[/tex]

Step-by-step explanation:

[tex]18+6p=90\:[/tex]

[tex]18+6p-18=90-18[/tex]

[tex]6p=72[/tex]

[tex]\cfrac{6p}{6}=\cfrac{72}{6}[/tex]

[tex]p=12[/tex]

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