College

Select the equation needed to solve the following word problem:

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. [tex]x + 20 = 12[/tex]
B. [tex]x - 8 = 20[/tex]
C. [tex]x + 12 = 20[/tex]
D. [tex]x + 8 = 12[/tex]

Answer :

Final answer:

To solve the word problem, use the equation x + 12 = 20 and subtract 12 from both sides to find the value of x. Kayla has already mailed 8 invitations for the pizza party.


Explanation:

To solve the word problem, we can use the equation x + 12 = 20, where x represents the number of invitations already mailed. By subtracting 12 from both sides of the equation, we can find the value of x. Thus, x = 20 - 12, which equals 8. Therefore, Kayla has already mailed 8 invitations for the pizza party.


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