Mathematics, 30.06.2019 02:00 ezzyandrade7

Kayla is sending invitations to 20 of her friends for a pizza party. if there are 12 invitations left to send out, how many invitations has she already mailed? °a). x-8=20 °b). x+20=12 °c). x+8=12 °d). x+12=20

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