If 15 is added to twice a number the result will be equal to that number increased by 23 find the answer what is the equation and solve the problem

Icould really use some with this question.

Samantha is growing a garden in her back yard. she spend $90 setting up the garden bed and buying the proper garden supplies. in addition, each seed she plants cost $0.25. a. write the function f(x) that represents samantha's total cost on her garden. b. explain what x represents. c. explain what f(x) represents. d. if samantha plants 55 seeds, how much did she spend in total?

Which of the following best describes the delian problem?