Can someone tell me how you can use disributive property on this equation to make it equal the same thing because i dont understand the x is confusing and i dont understand the point of the x do it in 2 ways break it down once and then break it down again.

Carla is saving money for a trip this summer. she already has some money in her savings account and will add the same amount to her account each week. at the end of 2? weeks, carla has? $130. at the end of 8? weeks, she has? $280. write a linear function in the form y=mx+b to represent the amount of money m that carla has saved after w weeks.