In 2003, people in the United States who earned between $28,401 and $68,800 per year were in the 25% tax bracket. The amount of federal income tax T they owed was given by the following equation:

T = 3,910 + 0.25(w − 28,400)

where w was their total taxable income for the year. Which equation could be used to find the amount of total taxable income of a person who paid $9,310 of federal income tax?

Please write the problem solution in the solution text box; do not attach files.

Also, do not post short title without the actual solution (to be appended later). Post the answer right away. I need the answers with all the steps (including equations) shown. Do not include the Problem text before your answer unless you are quoting it in the answer you provide. Thanks!