X + 128 = x + 68 find x

Which of the following is the shape of a cross section of the figure shown below

Pls yall i really need the answer fr fr

In stepmber, daniel and justin opened a business. during their first three months of business, their average monthly profit was $51. if during their first month, they lost $29, and during their second month, they gained $115, what was their profit or loss for their third plzzz i will give you 299 points