Respuesta :

-3+11p
first you add 1+2p that gets you -3 then you do 9p-4 and you get 11p from there you can either solve it, or leave it as is, depending on what your teacher wants.
inexplicable

1+2p+9p-4

= 1 - 4 + 2p + 9p

= -3 + 2p + 9p

= -3 + 11p

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good job