Answer:
D
Explanation:
Casey has some number of video games at the beginning called x. He sells half which is 1/2 x. Then he buys 3 more so 1/2 x + 3. This is equal to his current amount which is 27. So 1/2 x + 3 = 27. Solve for x.
1/2 x + 3 = 27
1/2 x =24
x = 48