Kim spend 70% of her salary.And kept 1 200 for her savings.Now, since 70% of her salaray goes to her expenses, I assumed that 1200 is the 30% of her salary.=> let's find out how much is her salary
:=> 30% = .30
=> .30x = 1 200=>
.30x / .30 = 1 200 / .30
=> x = 4000 dollars is her salary.