help! don't understand this problem.

Question

Jessica's financial advisor believes that she should spend no more than 28% of her gross monthly income for housing. She has determined that amount is $1,400 per month. Based on this amount and her advisor's recommendation, what is Jessica's annual salary?

Answer 1

Let x=gross monthly income

Therefore, 12x=yearly salary.

Also, 28% of x, or 0.28x, equals 1400:

                                                       0.28x=1400

Solving for x: x=1400/0.28

                    x=5000

Her annual salary is then 12x:

                                                      12(5000)=$60,000