This is all I need because its 55% of my grade on this practice, please help ty.

, , , ,

Step-by-step explanation:

First question:

He starts with 18, gains 2 every week, and needs 42. This means the equation is .

Second question:

He starts with 2, gains 18 every week, and needs 42. This means the equation is .

Third question:

It starts with 42, loses 2 every day, and needs 18. This means the equation is .

Fourth question:

Each friend has a total bill of 18+x, there are 2 friends, and they need 42. This means the equation is .

The only answer left is , so that's the answer to the fifth problem.

you need to add a picture